88 Commits

Author	SHA1	Message	Date
Raghavendra Rao Ananta	5bd75403be	Merge remote-tracking branch 'remotes/origin/tmp-f686d9f' into msm-lahaina ... * remotes/origin/tmp-f686d9f: ANDROID: update abi_gki_aarch64.xml for 5.2-rc6 Linux 5.2-rc6 Revert "iommu/vt-d: Fix lock inversion between iommu->lock and device_domain_lock" Bluetooth: Fix regression with minimum encryption key size alignment tcp: refine memory limit test in tcp_fragment() x86/vdso: Prevent segfaults due to hoisted vclock reads SUNRPC: Fix a credential refcount leak Revert "SUNRPC: Declare RPC timers as TIMER_DEFERRABLE" net :sunrpc :clnt :Fix xps refcount imbalance on the error path NFS4: Only set creation opendata if O_CREAT ANDROID: gki_defconfig: workaround to enable configs ANDROID: gki_defconfig: more configs for partners ARM: 8867/1: vdso: pass --be8 to linker if necessary KVM: nVMX: reorganize initial steps of vmx_set_nested_state KVM: PPC: Book3S HV: Invalidate ERAT when flushing guest TLB entries habanalabs: use u64_to_user_ptr() for reading user pointers nfsd: replace Jeff by Chuck as nfsd co-maintainer inet: clear num_timeout reqsk_alloc() PCI/P2PDMA: Ignore root complex whitelist when an IOMMU is present net: mvpp2: debugfs: Add pmap to fs dump ipv6: Default fib6_type to RTN_UNICAST when not set net: hns3: Fix inconsistent indenting net/af_iucv: always register net_device notifier net/af_iucv: build proper skbs for HiperTransport net/af_iucv: remove GFP_DMA restriction for HiperTransport doc: fix documentation about UIO_MEM_LOGICAL using MAINTAINERS / Documentation: Thorsten Scherer is the successor of Gavin Schenk docs: fb: Add TER16x32 to the available font names MAINTAINERS: fpga: hand off maintainership to Moritz treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 507 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 506 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 503 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 502 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 501 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 498 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 496 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 495 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 491 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 490 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 489 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 488 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 487 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 486 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 485 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 484 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 481 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 480 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 479 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 477 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 475 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 474 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 473 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 472 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 471 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 469 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 468 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 467 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 466 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 465 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 464 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 463 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 462 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 461 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 460 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 459 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 457 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 456 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 455 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 454 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 452 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 451 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 250 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 247 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 246 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 245 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 244 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 243 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 239 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 238 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 237 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 235 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 233 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 231 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 226 KVM: arm/arm64: Fix emulated ptimer irq injection net: dsa: mv88e6xxx: fix shift of FID bits in mv88e6185_g1_vtu_loadpurge() tests: kvm: Check for a kernel warning kvm: tests: Sort tests in the Makefile alphabetically KVM: x86/mmu: Allocate PAE root array when using SVM's 32-bit NPT KVM: x86: Modify struct kvm_nested_state to have explicit fields for data fanotify: update connector fsid cache on add mark quota: fix a problem about transfer quota drm/i915: Don't clobber M/N values during fastset check powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac ovl: make i_ino consistent with st_ino in more cases scsi: qla2xxx: Fix hardlockup in abort command during driver remove scsi: ufs: Avoid runtime suspend possibly being blocked forever scsi: qedi: update driver version to 8.37.0.20 scsi: qedi: Check targetname while finding boot target information hvsock: fix epollout hang from race condition net/udp_gso: Allow TX timestamp with UDP GSO net: netem: fix use after free and double free with packet corruption net: netem: fix backlog accounting for corrupted GSO frames net: lio_core: fix potential sign-extension overflow on large shift tipc: pass tunnel dev as NULL to udp_tunnel(6)_xmit_skb ip6_tunnel: allow not to count pkts on tstats by passing dev as NULL ip_tunnel: allow not to count pkts on tstats by setting skb's dev to NULL apparmor: reset pos on failure to unpack for various functions apparmor: enforce nullbyte at end of tag string apparmor: fix PROFILE_MEDIATES for untrusted input RDMA/efa: Handle mmap insertions overflow tun: wake up waitqueues after IFF_UP is set drm: return -EFAULT if copy_to_user() fails net: remove duplicate fetch in sock_getsockopt tipc: fix issues with early FAILOVER_MSG from peer bnx2x: Check if transceiver implements DDM before access xhci: detect USB 3.2 capable host controllers correctly usb: xhci: Don't try to recover an endpoint if port is in error state. KVM: fix typo in documentation drm/panfrost: Make sure a BO is only unmapped when appropriate md: fix for divide error in status_resync soc: ixp4xx: npe: Fix an IS_ERR() vs NULL check in probe arm64/mm: don't initialize pgd_cache twice MAINTAINERS: Update my email address arm64/sve: <uapi/asm/ptrace.h> should not depend on <uapi/linux/prctl.h> ovl: fix typo in MODULE_PARM_DESC ovl: fix bogus -Wmaybe-unitialized warning ovl: don't fail with disconnected lower NFS mmc: core: Prevent processing SDIO IRQs when the card is suspended mmc: sdhci: sdhci-pci-o2micro: Correctly set bus width when tuning brcmfmac: sdio: Don't tune while the card is off mmc: core: Add sdio_retune_hold_now() and sdio_retune_release() brcmfmac: sdio: Disable auto-tuning around commands expected to fail mmc: core: API to temporarily disable retuning for SDIO CRC errors Revert "brcmfmac: disable command decode in sdio_aos" ARM: ixp4xx: include irqs.h where needed ARM: ixp4xx: mark ixp4xx_irq_setup as __init ARM: ixp4xx: don't select SERIAL_OF_PLATFORM firmware: trusted_foundations: add ARMv7 dependency usb: dwc2: Use generic PHY width in params setup RDMA/efa: Fix success return value in case of error IB/hfi1: Handle port down properly in pio IB/hfi1: Handle wakeup of orphaned QPs for pio IB/hfi1: Wakeup QPs orphaned on wait list after flush IB/hfi1: Use aborts to trigger RC throttling IB/hfi1: Create inline to get extended headers IB/hfi1: Silence txreq allocation warnings IB/hfi1: Avoid hardlockup with flushlist_lock KVM: PPC: Book3S HV: Only write DAWR[X] when handling h_set_dawr in real mode KVM: PPC: Book3S HV: Fix r3 corruption in h_set_dabr() fs/namespace: fix unprivileged mount propagation vfs: fsmount: add missing mntget() cifs: fix GlobalMid_Lock bug in cifs_reconnect SMB3: retry on STATUS_INSUFFICIENT_RESOURCES instead of failing write staging: erofs: add requirements field in superblock arm64: ssbd: explicitly depend on <linux/prctl.h> block: fix page leak when merging to same page block: return from __bio_try_merge_page if merging occured in the same page Btrfs: fix failure to persist compression property xattr deletion on fsync riscv: remove unused barrier defines usb: chipidea: udc: workaround for endpoint conflict issue MAINTAINERS: Change QCOM repo location mmc: mediatek: fix SDIO IRQ detection issue mmc: mediatek: fix SDIO IRQ interrupt handle flow mmc: core: complete HS400 before checking status riscv: mm: synchronize MMU after pte change MAINTAINERS: Update my email address to use @kernel.org ANDROID: update abi_gki_aarch64.xml for 5.2-rc5 riscv: dts: add initial board data for the SiFive HiFive Unleashed riscv: dts: add initial support for the SiFive FU540-C000 SoC dt-bindings: riscv: convert cpu binding to json-schema dt-bindings: riscv: sifive: add YAML documentation for the SiFive FU540 arch: riscv: add support for building DTB files from DT source data drm/i915/gvt: ignore unexpected pvinfo write lapb: fixed leak of control-blocks. tipc: purge deferredq list for each grp member in tipc_group_delete ax25: fix inconsistent lock state in ax25_destroy_timer neigh: fix use-after-free read in pneigh_get_next tcp: fix compile error if !CONFIG_SYSCTL hv_sock: Suppress bogus "may be used uninitialized" warnings be2net: Fix number of Rx queues used for flow hashing net: handle 802.1P vlan 0 packets properly Linux 5.2-rc5 tcp: enforce tcp_min_snd_mss in tcp_mtu_probing() tcp: add tcp_min_snd_mss sysctl tcp: tcp_fragment() should apply sane memory limits tcp: limit payload size of sacked skbs Revert "net: phylink: set the autoneg state in phylink_phy_change" bpf: fix nested bpf tracepoints with per-cpu data bpf: Fix out of bounds memory access in bpf_sk_storage vsock/virtio: set SOCK_DONE on peer shutdown net: dsa: rtl8366: Fix up VLAN filtering net: phylink: set the autoneg state in phylink_phy_change powerpc/32: fix build failure on book3e with KVM powerpc/booke: fix fast syscall entry on SMP powerpc/32s: fix initial setup of segment registers on secondary CPU x86/microcode, cpuhotplug: Add a microcode loader CPU hotplug callback net: add high_order_alloc_disable sysctl/static key tcp: add tcp_tx_skb_cache sysctl tcp: add tcp_rx_skb_cache sysctl sysctl: define proc_do_static_key() hv_netvsc: Set probe mode to sync net: sched: flower: don't call synchronize_rcu() on mask creation net: dsa: fix warning same module names sctp: Free cookie before we memdup a new one net: dsa: microchip: Don't try to read stats for unused ports qmi_wwan: extend permitted QMAP mux_id value range qmi_wwan: avoid RCU stalls on device disconnect when in QMAP mode qmi_wwan: add network device usage statistics for qmimux devices qmi_wwan: add support for QMAP padding in the RX path bpf, x64: fix stack layout of JITed bpf code Smack: Restore the smackfsdef mount option and add missing prefixes bpf, devmap: Add missing RCU read lock on flush bpf, devmap: Add missing bulk queue free bpf, devmap: Fix premature entry free on destroying map ftrace: Fix NULL pointer dereference in free_ftrace_func_mapper() module: Fix livepatch/ftrace module text permissions race tracing/uprobe: Fix obsolete comment on trace_uprobe_create() tracing/uprobe: Fix NULL pointer dereference in trace_uprobe_create() tracing: Make two symbols static tracing: avoid build warning with HAVE_NOP_MCOUNT tracing: Fix out-of-range read in trace_stack_print() gfs2: Fix rounding error in gfs2_iomap_page_prepare net: phylink: further mac_config documentation improvements nfc: Ensure presence of required attributes in the deactivate_target handler btrfs: start readahead also in seed devices x86/kasan: Fix boot with 5-level paging and KASAN cfg80211: report measurement start TSF correctly cfg80211: fix memory leak of wiphy device name cfg80211: util: fix bit count off by one mac80211: do not start any work during reconfigure flow cfg80211: use BIT_ULL in cfg80211_parse_mbssid_data() mac80211: only warn once on chanctx_conf being NULL mac80211: drop robust management frames from unknown TA gpu: ipu-v3: image-convert: Fix image downsize coefficients gpu: ipu-v3: image-convert: Fix input bytesperline for packed formats gpu: ipu-v3: image-convert: Fix input bytesperline width/height align thunderbolt: Implement CIO reset correctly for Titan Ridge ARM: davinci: da8xx: specify dma_coherent_mask for lcdc ARM: davinci: da850-evm: call regulator_has_full_constraints() timekeeping: Repair ktime_get_coarse*() granularity Revert "ALSA: hda/realtek - Improve the headset mic for Acer Aspire laptops" ANDROID: update abi_gki_aarch64.xml mm/devm_memremap_pages: fix final page put race PCI/P2PDMA: track pgmap references per resource, not globally lib/genalloc: introduce chunk owners PCI/P2PDMA: fix the gen_pool_add_virt() failure path mm/devm_memremap_pages: introduce devm_memunmap_pages drivers/base/devres: introduce devm_release_action() mm/vmscan.c: fix trying to reclaim unevictable LRU page coredump: fix race condition between collapse_huge_page() and core dumping mm/mlock.c: change count_mm_mlocked_page_nr return type mm: mmu_gather: remove __tlb_reset_range() for force flush fs/ocfs2: fix race in ocfs2_dentry_attach_lock() mm/vmscan.c: fix recent_rotated history mm/mlock.c: mlockall error for flag MCL_ONFAULT scripts/decode_stacktrace.sh: prefix addr2line with $CROSS_COMPILE mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node mm: memcontrol: don't batch updates of local VM stats and events PCI: PM: Skip devices in D0 for suspend-to-idle ANDROID: Removed extraneous configs from gki powerpc/bpf: use unsigned division instruction for 64-bit operations bpf: fix div64 overflow tests to properly detect errors bpf: sync BPF_FIB_LOOKUP flag changes with BPF uapi bpf: simplify definition of BPF_FIB_LOOKUP related flags cifs: add spinlock for the openFileList to cifsInodeInfo cifs: fix panic in smb2_reconnect x86/fpu: Don't use current->mm to check for a kthread KVM: nVMX: use correct clean fields when copying from eVMCS vfio-ccw: Destroy kmem cache region on module exit block/ps3vram: Use %llu to format sector_t after LBDAF removal libata: Extend quirks for the ST1000LM024 drives with NOLPM quirk bcache: only set BCACHE_DEV_WB_RUNNING when cached device attached bcache: fix stack corruption by PRECEDING_KEY() arm64/sve: Fix missing SVE/FPSIMD endianness conversions blk-mq: remove WARN_ON(!q->elevator) from blk_mq_sched_free_requests blkio-controller.txt: Remove references to CFQ block/switching-sched.txt: Update to blk-mq schedulers null_blk: remove duplicate check for report zone blk-mq: no need to check return value of debugfs_create functions io_uring: fix memory leak of UNIX domain socket inode block: force select mq-deadline for zoned block devices binder: fix possible UAF when freeing buffer drm/amdgpu: return 0 by default in amdgpu_pm_load_smu_firmware drm/amdgpu: Fix bounds checking in amdgpu_ras_is_supported() ANDROID: x86 gki_defconfig: enable DMA_CMA ANDROID: Fixed x86 regression ANDROID: gki_defconfig: enable DMA_CMA Input: synaptics - enable SMBus on ThinkPad E480 and E580 net: mvpp2: prs: Use the correct helpers when removing all VID filters net: mvpp2: prs: Fix parser range for VID filtering mlxsw: spectrum: Disallow prio-tagged packets when PVID is removed mlxsw: spectrum_buffers: Reduce pool size on Spectrum-2 selftests: tc_flower: Add TOS matching test mlxsw: spectrum_flower: Fix TOS matching selftests: mlxsw: Test nexthop offload indication mlxsw: spectrum_router: Refresh nexthop neighbour when it becomes dead mlxsw: spectrum: Use different seeds for ECMP and LAG hash net: tls, correctly account for copied bytes with multiple sk_msgs vrf: Increment Icmp6InMsgs on the original netdev cpuset: restore sanity to cpuset_cpus_allowed_fallback() net: ethtool: Allow matching on vlan DEI bit linux-next: DOC: RDS: Fix a typo in rds.txt x86/kgdb: Return 0 from kgdb_arch_set_breakpoint() mpls: fix af_mpls dependencies for real selinux: fix a missing-check bug in selinux_sb_eat_lsm_opts() selinux: fix a missing-check bug in selinux_add_mnt_opt( ) arm64: tlbflush: Ensure start/end of address range are aligned to stride usb: typec: Make sure an alt mode exist before getting its partner KVM: arm/arm64: vgic: Fix kvm_device leak in vgic_its_destroy KVM: arm64: Filter out invalid core register IDs in KVM_GET_REG_LIST KVM: arm64: Implement vq_present() as a macro xdp: check device pointer before clearing bpf: net: Set sk_bpf_storage back to NULL for cloned sk Btrfs: fix race between block group removal and block group allocation clocksource/drivers/arm_arch_timer: Don't trace count reader functions i2c: pca-platform: Fix GPIO lookup code thunderbolt: Make sure device runtime resume completes before taking domain lock drm: add fallback override/firmware EDID modes workaround i2c: acorn: fix i2c warning arm64: Don't unconditionally add -Wno-psabi to KBUILD_CFLAGS drm/edid: abstract override/firmware EDID retrieval platform/mellanox: mlxreg-hotplug: Add devm_free_irq call to remove flow platform/x86: mlx-platform: Fix parent device in i2c-mux-reg device registration platform/x86: intel-vbtn: Report switch events when event wakes device platform/x86: asus-wmi: Only Tell EC the OS will handle display hotkeys from asus_nb_wmi ARM: mvebu_v7_defconfig: fix Ethernet on Clearfog x86/resctrl: Prevent NULL pointer dereference when local MBM is disabled x86/resctrl: Don't stop walking closids when a locksetup group is found iommu/arm-smmu: Avoid constant zero in TLBI writes drm/i915/perf: fix whitelist on Gen10+ drm/i915/sdvo: Implement proper HDMI audio support for SDVO drm/i915: Fix per-pixel alpha with CCS drm/i915/dmc: protect against reading random memory drm/i915/dsi: Use a fuzzy check for burst mode clock check Input: imx_keypad - make sure keyboard can always wake up system selinux: log raw contexts as untrusted strings ptrace: restore smp_rmb() in __ptrace_may_access() IB/hfi1: Correct tid qp rcd to match verbs context IB/hfi1: Close PSM sdma_progress sleep window IB/hfi1: Validate fault injection opcode user input geneve: Don't assume linear buffers in error handler vxlan: Don't assume linear buffers in error handler net: openvswitch: do not free vport if register_netdevice() is failed. net: correct udp zerocopy refcnt also when zerocopy only on append drm/amdgpu/{uvd,vcn}: fetch ring's read_ptr after alloc ovl: fix wrong flags check in FS_IOC_FS[SG]ETXATTR ioctls riscv: Fix udelay in RV32. drm/vmwgfx: fix a warning due to missing dma_parms riscv: export pm_power_off again drm/vmwgfx: Honor the sg list segment size limitation RISC-V: defconfig: enable clocks, serial console drm/vmwgfx: Use the backdoor port if the HB port is not available bpf: lpm_trie: check left child of last leftmost node for NULL Revert "fuse: require /dev/fuse reads to have enough buffer capacity" ALSA: ice1712: Check correct return value to snd_i2c_sendbytes (EWS/DMX 6Fire) ALSA: oxfw: allow PCM capture for Stanton SCS.1m ALSA: firewire-motu: fix destruction of data for isochronous resources s390/ctl_reg: mark __ctl_set_bit and __ctl_clear_bit as __always_inline s390/boot: disable address-of-packed-member warning ANDROID: update gki aarch64 ABI representation cgroup: Fix css_task_iter_advance_css_set() cset skip condition drm/panfrost: Require the simple_ondemand governor drm/panfrost: make devfreq optional again drm/gem_shmem: Use a writecombine mapping for ->vaddr mmc: sdhi: disallow HS400 for M3-W ES1.2, RZ/G2M, and V3H ASoC: Intel: sst: fix kmalloc call with wrong flags ASoC: core: Fix deadlock in snd_soc_instantiate_card() cgroup/bfq: revert bfq.weight symlink change ARM: dts: am335x phytec boards: Fix cd-gpios active level ARM: dts: dra72x: Disable usb4_tm target module nfp: ensure skb network header is set for packet redirect tcp: fix undo spurious SYNACK in passive Fast Open mpls: fix af_mpls dependencies ibmvnic: Fix unchecked return codes of memory allocations ibmvnic: Refresh device multicast list after reset ibmvnic: Do not close unopened driver during reset mpls: fix warning with multi-label encap net: phy: rename Asix Electronics PHY driver ipv6: flowlabel: fl6_sock_lookup() must use atomic_inc_not_zero net: ipv4: fib_semantics: fix uninitialized variable Input: iqs5xx - get axis info before calling input_mt_init_slots() Linux 5.2-rc4 drm: panel-orientation-quirks: Add quirk for GPD MicroPC drm: panel-orientation-quirks: Add quirk for GPD pocket2 counter/ftm-quaddec: Add missing dependencies in Kconfig staging: iio: adt7316: Fix build errors when GPIOLIB is not set x86/fpu: Update kernel's FPU state before using for the fsave header MAINTAINERS: Karthikeyan Ramasubramanian is MIA i2c: xiic: Add max_read_len quirk ANDROID: update ABI representation gpio: pca953x: hack to fix 24 bit gpio expanders net/mlx5e: Support tagged tunnel over bond net/mlx5e: Avoid detaching non-existing netdev under switchdev mode net/mlx5e: Fix source port matching in fdb peer flow rule net/mlx5e: Replace reciprocal_scale in TX select queue function net/mlx5e: Add ndo_set_feature for uplink representor net/mlx5: Avoid reloading already removed devices net/mlx5: Update pci error handler entries and command translation RAS/CEC: Convert the timer callback to a workqueue RAS/CEC: Fix binary search function x86/mm/KASLR: Compute the size of the vmemmap section properly can: purge socket error queue on sock destruct can: flexcan: Remove unneeded registration message can: af_can: Fix error path of can_init() can: m_can: implement errata "Needless activation of MRAF irq" can: mcp251x: add support for mcp25625 dt-bindings: can: mcp251x: add mcp25625 support can: xilinx_can: use correct bittiming_const for CAN FD core can: flexcan: fix timeout when set small bitrate can: usb: Kconfig: Remove duplicate menu entry lockref: Limit number of cmpxchg loop retries uaccess: add noop untagged_addr definition x86/insn-eval: Fix use-after-free access to LDT entry kbuild: use more portable 'command -v' for cc-cross-prefix s390/unwind: correct stack switching during unwind scsi: hpsa: correct ioaccel2 chaining btrfs: Always trim all unallocated space in btrfs_trim_free_extents netfilter: ipv6: nf_defrag: accept duplicate fragments again powerpc/32s: fix booting with CONFIG_PPC_EARLY_DEBUG_BOOTX drm/meson: fix G12A primary plane disabling drm/meson: fix primary plane disabling drm/meson: fix G12A HDMI PLL settings for 4K60 1000/1001 variations block, bfq: add weight symlink to the bfq.weight cgroup parameter cgroup: let a symlink too be created with a cftype file powerpc/64s: __find_linux_pte() synchronization vs pmdp_invalidate() powerpc/64s: Fix THP PMD collapse serialisation powerpc: Fix kexec failure on book3s/32 drm/nouveau/secboot/gp10[2467]: support newer FW to fix SEC2 failures on some boards drm/nouveau/secboot: enable loading of versioned LS PMU/SEC2 ACR msgqueue FW drm/nouveau/secboot: split out FW version-specific LS function pointers drm/nouveau/secboot: pass max supported FW version to LS load funcs drm/nouveau/core: support versioned firmware loading drm/nouveau/core: pass subdev into nvkm_firmware_get, rather than device block: free sched's request pool in blk_cleanup_queue bpf: expand section tests for test_section_names bpf: more msg_name rewrite tests to test_sock_addr bpf, bpftool: enable recvmsg attach types bpf, libbpf: enable recvmsg attach types bpf: sync tooling uapi header bpf: fix unconnected udp hooks vfio/mdev: Synchronize device create/remove with parent removal vfio/mdev: Avoid creating sysfs remove file on stale device removal pktgen: do not sleep with the thread lock held. net: mvpp2: Use strscpy to handle stat strings net: rds: fix memory leak in rds_ib_flush_mr_pool ipv6: fix EFAULT on sendto with icmpv6 and hdrincl ipv6: use READ_ONCE() for inet->hdrincl as in ipv4 soundwire: intel: set dai min and max channels correctly soundwire: stream: fix bad unlock balance x86/fpu: Use fault_in_pages_writeable() for pre-faulting nvme-rdma: use dynamic dma mapping per command nvme: Fix u32 overflow in the number of namespace list calculation vfio/mdev: Improve the create/remove sequence SoC: rt274: Fix internal jack assignment in set_jack callback ALSA: hdac: fix memory release for SST and SOF drivers ASoC: SOF: Intel: hda: use the defined ppcap functions ASoC: core: move DAI pre-links initiation to snd_soc_instantiate_card ASoC: Intel: cht_bsw_rt5672: fix kernel oops with platform_name override ASoC: Intel: cht_bsw_nau8824: fix kernel oops with platform_name override ASoC: Intel: bytcht_es8316: fix kernel oops with platform_name override ASoC: Intel: cht_bsw_max98090: fix kernel oops with platform_name override Revert "gfs2: Replace gl_revokes with a GLF flag" arm64: Silence gcc warnings about arch ABI drift parisc: Fix crash due alternative coding for NP iopdir_fdc bit parisc: Use lpa instruction to load physical addresses in driver code parisc: configs: Remove useless UEVENT_HELPER_PATH parisc: Use implicit space register selection for loading the coherence index of I/O pdirs usb: gadget: udc: lpc32xx: fix return value check in lpc32xx_udc_probe() usb: gadget: dwc2: fix zlp handling usb: dwc2: Set actual frame number for completed ISOC transfer for none DDMA usb: gadget: udc: lpc32xx: allocate descriptor with GFP_ATOMIC usb: gadget: fusb300_udc: Fix memory leak of fusb300->ep[i] usb: phy: mxs: Disable external charger detect in mxs_phy_hw_init() usb: dwc2: Fix DMA cache alignment issues usb: dwc2: host: Fix wMaxPacketSize handling (fix webcam regression) ARM64: trivial: s/TIF_SECOMP/TIF_SECCOMP/ comment typo fix drm/komeda: Potential error pointer dereference drm/komeda: remove set but not used variable 'kcrtc' x86/CPU: Add more Icelake model numbers hwmon: (pmbus/core) Treat parameters as paged if on multiple pages hwmon: (pmbus/core) mutex_lock write in pmbus_set_samples hwmon: (core) add thermal sensors only if dev->of_node is present Revert "fib_rules: return 0 directly if an exactly same rule exists when NLM_F_EXCL not supplied" net: aquantia: fix wol configuration not applied sometimes ethtool: fix potential userspace buffer overflow Fix memory leak in sctp_process_init net: rds: fix memory leak when unload rds_rdma ipv6: fix the check before getting the cookie in rt6_get_cookie ipv4: not do cache for local delivery if bc_forwarding is enabled selftests: vm: Fix test build failure when built by itself tools: bpftool: Fix JSON output when lookup fails mmc: also set max_segment_size in the device mtip32xx: also set max_segment_size in the device rsxx: don't call dma_set_max_seg_size nvme-pci: don't limit DMA segement size s390/qeth: handle error when updating TX queue count s390/qeth: fix VLAN attribute in bridge_hostnotify udev event s390/qeth: check dst entry before use s390/qeth: handle limited IPv4 broadcast in L3 TX path ceph: fix error handling in ceph_get_caps() ceph: avoid iput_final() while holding mutex or in dispatch thread ceph: single workqueue for inode related works cgroup: css_task_iter_skip()'d iterators must be advanced before accessed drm/amd/amdgpu: add RLC firmware to support raven1 refresh drm/amd/powerplay: add set_power_profile_mode for raven1_refresh drm/amdgpu: fix ring test failure issue during s3 in vce 3.0 (V2) treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 450 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 449 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 448 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 446 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 445 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 444 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 443 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 442 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 440 treewide: Replace GPLv2 boilerplate/reference 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Handle Clang auto-initialization pattern block: Drop unlikely before IS_ERR(_OR_NULL) xen/swiotlb: don't initialize swiotlb twice on arm64 s390/mm: fix address space detection in exception handling HID: logitech-dj: Fix 064d:c52f receiver support Revert "HID: core: Call request_module before doing device_add" Revert "HID: core: Do not call request_module() in async context" Revert "HID: Increase maximum report size allowed by hid_field_extract()" tests: fix pidfd-test compilation signal: improve comments samples: fix pidfd-metadata compilation arm64: arch_timer: mark functions as __always_inline arm64: smp: Moved cpu_logical_map[] to smp.h arm64: cpufeature: Fix missing ZFR0 in __read_sysreg_by_encoding() selftests/bpf: move test_lirc_mode2_user to TEST_GEN_PROGS_EXTENDED USB: Fix chipmunk-like voice when using Logitech C270 for recording audio. USB: usb-storage: Add new ID to ums-realtek udmabuf: actually unmap the scatterlist net: fix indirect calls helpers for ptype list hooks. net: ipvlan: Fix ipvlan device tso disabled while NETIF_F_IP_CSUM is set scsi: smartpqi: unlock on error in pqi_submit_raid_request_synchronous() scsi: ufs: Check that space was properly alloced in copy_query_response udp: only choose unbound UDP socket for multicast when not in a VRF net/tls: replace the sleeping lock around RX resync with a bit lock Revert "net/tls: avoid NULL-deref on resync during device removal" block: aoe: no need to check return value of debugfs_create functions net: dsa: sja1105: Fix link speed not working at 100 Mbps and below net: phylink: avoid reducing support mask scripts/checkstack.pl: Fix arm64 wrong or unknown architecture kbuild: tar-pkg: enable communication with jobserver kconfig: tests: fix recursive inclusion unit test kbuild: teach kselftest-merge to find nested config files nvmet: fix data_len to 0 for bdev-backed write_zeroes MAINTAINERS: Hand over skd maintainership ASoC: sun4i-i2s: Add offset to RX channel select ASoC: sun4i-i2s: Fix sun8i tx channel offset mask ASoC: max98090: remove 24-bit format support if RJ is 0 ASoC: da7219: Fix build error without CONFIG_I2C ASoC: SOF: Intel: hda: Fix COMPILE_TEST build error drm/arm/hdlcd: Allow a bit of clock tolerance drm/arm/hdlcd: Actually validate CRTC modes drm/arm/mali-dp: Add a loop around the second set CVAL and try 5 times drm/komeda: fixing of DMA mapping sg segment warning netfilter: ipv6: nf_defrag: fix leakage of unqueued fragments habanalabs: Read upper bits of trace buffer from RWPHI arm64: arch_k3: Fix kconfig dependency warning drm: don't block fb changes for async plane updates drm/vc4: fix fb references in async update drm/msm: fix fb references in async update drm/amd: fix fb references in async update drm/rockchip: fix fb references in async update xen-blkfront: switch kcalloc to kvcalloc for large array allocation drm/mediatek: call mtk_dsi_stop() after mtk_drm_crtc_atomic_disable() drm/mediatek: clear num_pipes when unbind driver drm/mediatek: call drm_atomic_helper_shutdown() when unbinding driver drm/mediatek: unbind components in mtk_drm_unbind() drm/mediatek: fix unbind functions net: sfp: read eeprom in maximum 16 byte increments selftests: set sysctl bc_forwarding properly in router_broadcast.sh ANDROID: update gki aarch64 ABI representation net: ethernet: mediatek: Use NET_IP_ALIGN to judge if HW RX_2BYTE_OFFSET is enabled net: ethernet: mediatek: Use hw_feature to judge if HWLRO is supported net: ethernet: ti: cpsw_ethtool: fix ethtool ring param set ANDROID: gki_defconfig: Enable CMA, SLAB_FREELIST (RANDOM and HARDENED) on x86 bpf: udp: Avoid calling reuseport's bpf_prog from udp_gro bpf: udp: ipv6: Avoid running reuseport's bpf_prog from __udp6_lib_err rcu: locking and unlocking need to always be at least barriers ANDROID: gki_defconfig: enable SLAB_FREELIST_RANDOM, SLAB_FREELIST_HARDENED ANDROID: gki_defconfig: enable CMA and increase CMA_AREAS ASoC: SOF: fix DSP oops definitions in FW ABI ASoC: hda: fix unbalanced codec dev refcount for HDA_DEV_ASOC ASoC: SOF: ipc: replace fw ready bitfield with explicit bit ordering ASoC: SOF: bump to ABI 3.6 ASoC: SOF: soundwire: add initial soundwire support ASoC: SOF: uapi: mirror firmware changes ASoC: Intel: Baytrail: add quirk for Aegex 10 (RU2) tablet xfs: inode btree scrubber should calculate im_boffset correctly mmc: sdhci_am654: Fix SLOTTYPE write usb: typec: ucsi: ccg: fix memory leak in do_flash ANDROID: update gki aarch64 ABI representation habanalabs: Fix virtual address access via debugfs for 2MB pages drm/komeda: Constify the usage of komeda_component/pipeline/dev_funcs x86/power: Fix 'nosmt' vs hibernation triple fault during resume mm/vmalloc: Avoid rare case of flushing TLB with weird arguments mm/vmalloc: Fix calculation of direct map addr range PM: sleep: Add kerneldoc comments to some functions drm/i915/gvt: save RING_HEAD into vreg when vgpu switched out sparc: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD mdesc: fix a missing-check bug in get_vdev_port_node_info() drm/i915/gvt: add F_CMD_ACCESS flag for wa regs sparc64: Fix regression in non-hypervisor TLB flush xcall packet: unconditionally free po->rollover Update my email address net: hns: Fix loopback test failed at copper ports Linux 5.2-rc3 net: dsa: mv88e6xxx: avoid error message on remove from VLAN 0 mm, compaction: make sure we isolate a valid PFN include/linux/generic-radix-tree.h: fix kerneldoc comment kernel/signal.c: trace_signal_deliver when signal_group_exit drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used spdxcheck.py: fix directory structures kasan: initialize tag to 0xff in __kasan_kmalloc z3fold: fix sheduling while atomic scripts/gdb: fix invocation when CONFIG_COMMON_CLK is not set mm/gup: continue VM_FAULT_RETRY processing even for pre-faults ocfs2: fix error path kobject memory leak memcg: make it work on sparse non-0-node systems mm, memcg: consider subtrees in memory.events prctl_set_mm: downgrade mmap_sem to read lock prctl_set_mm: refactor checks from validate_prctl_map kernel/fork.c: make max_threads symbol static arch/arm/boot/compressed/decompress.c: fix build error due to lz4 changes arch/parisc/configs/c8000_defconfig: remove obsoleted CONFIG_DEBUG_SLAB_LEAK mm/vmalloc.c: fix typo in comment lib/sort.c: fix kernel-doc notation warnings mm: fix Documentation/vm/hmm.rst Sphinx warnings treewide: fix typos of SPDX-License-Identifier crypto: ux500 - fix license comment syntax error MAINTAINERS: add I2C DT bindings to ARM platforms MAINTAINERS: add DT bindings to i2c drivers mwifiex: Fix heap overflow in mwifiex_uap_parse_tail_ies() iwlwifi: mvm: change TLC config cmd sent by rs to be async iwlwifi: Fix double-free problems in iwl_req_fw_callback() iwlwifi: fix AX201 killer sku loading firmware issue iwlwifi: print fseq info upon fw assert iwlwifi: clear persistence bit according to device family iwlwifi: fix load in rfkill flow for unified firmware iwlwifi: mvm: remove d3_sram debugfs file bpf, riscv: clear high 32 bits for ALU32 add/sub/neg/lsh/rsh/arsh libbpf: Return btf_fd for load_sk_storage_btf HID: a4tech: fix horizontal scrolling HID: hyperv: Add a module description line net: dsa: sja1105: Don't store frame type in skb->cb block: print offending values when cloned rq limits are exceeded blk-mq: Document the blk_mq_hw_queue_to_node() arguments blk-mq: Fix spelling in a source code comment block: Fix bsg_setup_queue() kernel-doc header block: Fix rq_qos_wait() kernel-doc header block: Fix blk_mq_*_map_queues() kernel-doc headers block: Fix throtl_pending_timer_fn() kernel-doc header block: Convert blk_invalidate_devt() header into a non-kernel-doc header block/partitions/ldm: Convert a kernel-doc header into a non-kernel-doc header leds: avoid flush_work in atomic context cgroup: Include dying leaders with live threads in PROCS iterations cgroup: Implement css_task_iter_skip() cgroup: Call cgroup_release() before __exit_signal() netfilter: nf_tables: fix module autoload with inet family Revert "lockd: Show pid of lockd for remote locks" ALSA: hda/realtek - Update headset mode for ALC256 fs/adfs: fix filename fixup handling for "/" and "//" names fs/adfs: move append_filetype_suffix() into adfs_object_fixup() fs/adfs: remove truncated filename hashing fs/adfs: factor out filename fixup fs/adfs: factor out object fixups fs/adfs: factor out filename case lowering fs/adfs: factor out filename comparison ovl: doc: add non-standard corner cases pstore/ram: Run without kernel crash dump region MAINTAINERS: add Vasily Gorbik and Christian Borntraeger for s390 MAINTAINERS: Farewell Martin Schwidefsky pstore: Set tfm to NULL on free_buf_for_compression nds32: add new emulations for floating point instruction nds32: Avoid IEX status being incorrectly modified math-emu: Use statement expressions to fix Wshift-count-overflow warning net: correct zerocopy refcnt with udp MSG_MORE ethtool: Check for vlan etype or vlan tci when parsing flow_rule net: don't clear sock->sk early to avoid trouble in strparser net-gro: fix use-after-free read in napi_gro_frags() net: dsa: tag_8021q: Create a stable binary format net: dsa: tag_8021q: Change order of rx_vid setup net: mvpp2: fix bad MVPP2_TXQ_SCHED_TOKEN_CNTR_REG queue value docs cgroups: add another example size for hugetlb NFSv4.1: Fix bug only first CB_NOTIFY_LOCK is handled NFSv4.1: Again fix a race where CB_NOTIFY_LOCK fails to wake a waiter ipv4: tcp_input: fix stack out of bounds when parsing TCP options. mlxsw: spectrum: Prevent force of 56G mlxsw: spectrum_acl: Avoid warning after identical rules insertion SUNRPC: Fix a use after free when a server rejects the RPCSEC_GSS credential net: dsa: mv88e6xxx: fix handling of upper half of STATS_TYPE_PORT SUNRPC fix regression in umount of a secure mount r8169: fix MAC address being lost in PCI D3 treewide: Add SPDX license identifier - Kbuild treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 225 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 224 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 223 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 222 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 221 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 220 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 218 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 217 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 216 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 215 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 214 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 213 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 211 treewide: Replace GPLv2 boilerplate/reference with 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Replace GPLv2 boilerplate/reference with SPDX - rule 133 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 132 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 131 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 130 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 129 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 128 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 127 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 126 net: core: support XDP generic on stacked devices. netvsc: unshare skb in VF rx handler udp: Avoid post-GRO UDP checksum recalculation nvme-tcp: fix queue mapping when queue count is limited nvme-rdma: fix queue mapping when queue count is limited fpga: zynqmp-fpga: Correctly handle error pointer selftests: vm: install test_vmalloc.sh for run_vmtests userfaultfd: selftest: fix compiler warning kselftest/cgroup: fix incorrect test_core skip kselftest/cgroup: fix unexpected testing failure on test_core kselftest/cgroup: fix unexpected testing failure on test_memcontrol xtensa: Fix section mismatch between memblock_reserve and mem_reserve signal/ptrace: Don't leak unitialized kernel memory with PTRACE_PEEK_SIGINFO mwifiex: Abort at too short BSS descriptor element mwifiex: Fix possible buffer overflows at parsing bss descriptor drm/i915/gvt: Assign NULL to the pointer after memory free. drm/i915/gvt: Check if cur_pt_type is valid x86: intel_epb: Do not build when CONFIG_PM is unset crypto: hmac - fix memory leak in hmac_init_tfm() crypto: jitterentropy - change back to module_init() ARM: dts: Drop bogus CLKSEL for timer12 on dra7 KVM: PPC: Book3S HV: Restore SPRG3 in kvmhv_p9_guest_entry() KVM: PPC: Book3S HV: Fix lockdep warning when entering guest on POWER9 KVM: PPC: Book3S HV: XIVE: Fix page offset when clearing ESB pages KVM: PPC: Book3S HV: XIVE: Take the srcu read lock when accessing memslots KVM: PPC: Book3S HV: XIVE: Do not clear IRQ data of passthrough interrupts KVM: PPC: Book3S HV: XIVE: Introduce a new mutex for the XIVE device drm/i915/gvt: Fix cmd length of VEB_DI_IECP drm/i915/gvt: refine ggtt range validation drm/i915/gvt: Fix vGPU CSFE_CHICKEN1_REG mmio handler drm/i915/gvt: Fix GFX_MODE handling drm/i915/gvt: Update force-to-nonpriv register whitelist drm/i915/gvt: Initialize intel_gvt_gtt_entry in stack ima: show rules with IMA_INMASK correctly evm: check hash algorithm passed to init_desc() scsi: libsas: delete sas port if expander discover failed scsi: libsas: only clear phy->in_shutdown after shutdown event done scsi: scsi_dh_alua: Fix possible null-ptr-deref scsi: smartpqi: properly set both the DMA mask and the coherent DMA mask scsi: zfcp: fix to prevent port_remove with pure auto scan LUNs (only sdevs) scsi: zfcp: fix missing zfcp_port reference put on -EBUSY from port_remove scsi: libcxgbi: add a check for NULL pointer in cxgbi_check_route() net: phy: dp83867: Set up RGMII TX delay net: phy: dp83867: do not call config_init twice net: phy: dp83867: increase SGMII autoneg timer duration net: phy: dp83867: fix speed 10 in sgmii mode net: phy: marvell10g: report if the PHY fails to boot firmware net: phylink: ensure consistent phy interface mode cgroup: Use css_tryget() instead of css_tryget_online() in task_get_css() blk-mq: Fix memory leak in error handling usbip: usbip_host: fix stub_dev lock context imbalance regression net: sh_eth: fix mdio access in sh_eth_close() for R-Car Gen2 and RZ/A1 SoCs MIPS: uprobes: remove set but not used variable 'epc' s390/crypto: fix possible sleep during spinlock aquired MIPS: pistachio: Build uImage.gz by default MIPS: Make virt_addr_valid() return bool MIPS: Bounds check virt_addr_valid CIFS: cifs_read_allocate_pages: don't iterate through whole page array on ENOMEM RDMA/efa: Remove MAYEXEC flag check from mmap flow mlx5: avoid 64-bit division IB/hfi1: Validate page aligned for a given virtual address IB/{qib, hfi1, rdmavt}: Correct ibv_devinfo max_mr value IB/hfi1: Insure freeze_work work_struct is canceled on shutdown IB/rdmavt: Fix alloc_qpn() WARN_ON() ASoC: sun4i-codec: fix first delay on Speaker drm/amdgpu: reserve stollen vram for raven series media: venus: hfi_parser: fix a regression in parser selftests: bpf: fix compiler warning in flow_dissector test arm64: use the correct function type for __arm64_sys_ni_syscall arm64: use the correct function type in SYSCALL_DEFINE0 arm64: fix syscall_fn_t type block: don't protect generic_make_request_checks with blk_queue_enter block: move blk_exit_queue into __blk_release_queue selftests: bpf: complete sub-register zero extension checks selftests: bpf: move sub-register zero extension checks into subreg.c ovl: detect overlapping layers drm/i915/icl: Add WaDisableBankHangMode ALSA: fireface: Use ULL suffixes for 64-bit constants signal/arm64: Use force_sig not force_sig_fault for SIGKILL nl80211: fill all policy .type entries mac80211: free peer keys before vif down in mesh ANDROID: ABI out: Use the extension .xml rather then .out drm/mediatek: respect page offset for PRIME mmap calls drm/mediatek: adjust ddp clock control flow ALSA: hda/realtek - Improve the headset mic for Acer Aspire laptops KVM: PPC: Book3S HV: XIVE: Fix the enforced limit on the vCPU identifier KVM: PPC: Book3S HV: XIVE: Do not test the EQ flag validity when resetting KVM: PPC: Book3S HV: XIVE: Clear file mapping when device is released KVM: PPC: Book3S HV: Don't take kvm->lock around kvm_for_each_vcpu KVM: PPC: Book3S: Use new mutex to synchronize access to rtas token list KVM: PPC: Book3S HV: Use new mutex to synchronize MMU setup KVM: PPC: Book3S HV: Avoid touching arch.mmu_ready in XIVE release functions Revert "drivers: thermal: tsens: Add new operation to check if a sensor is enabled" net/mlx5e: Disable rxhash when CQE compress is enabled net/mlx5e: restrict the real_dev of vlan device is the same as uplink device net/mlx5: Allocate root ns memory using kzalloc to match kfree net/mlx5: Avoid double free in fs init error unwinding path net/mlx5: Avoid double free of root ns in the error flow path net/mlx5: Fix error handling in mlx5_load() Documentation: net-sysfs: Remove duplicate PHY device documentation llc: fix skb leak in llc_build_and_send_ui_pkt() selftests: pmtu: Fix encapsulating device in pmtu_vti6_link_change_mtu dfs_cache: fix a wrong use of kfree in flush_cache_ent() fs/cifs/smb2pdu.c: fix buffer free in SMB2_ioctl_free cifs: fix memory leak of pneg_inbuf on -EOPNOTSUPP ioctl case xenbus: Avoid deadlock during suspend due to open transactions xen/pvcalls: Remove set but not used variable tracing: Avoid memory leak in predicate_parse() habanalabs: fix bug in checking huge page optimization mmc: sdhci: Fix SDIO IRQ thread deadlock dpaa_eth: use only online CPU portals net: mvneta: Fix err code path of probe net: stmmac: Do not output error on deferred probe Btrfs: fix race updating log root item during fsync Btrfs: fix wrong ctime and mtime of a directory after log replay ARC: [plat-hsdk] Get rid of inappropriate PHY settings ARC: [plat-hsdk]: Add support of Vivante GPU ARC: [plat-hsdk]: enable creg-gpio controller Btrfs: fix fsync not persisting changed attributes of a directory btrfs: qgroup: Check bg while resuming relocation to avoid NULL pointer dereference btrfs: reloc: Also queue orphan reloc tree for cleanup to avoid BUG_ON() Btrfs: incremental send, fix emission of invalid clone operations Btrfs: incremental send, fix file corruption when no-holes feature is enabled btrfs: correct zstd workspace manager lock to use spin_lock_bh() btrfs: Ensure replaced device doesn't have pending chunk allocation ia64: fix build errors by exporting paddr_to_nid() ASoC: SOF: Intel: hda: fix the hda init chip ASoC: SOF: ipc: fix a race, leading to IPC timeouts ASoC: SOF: control: correct the copy size for bytes kcontrol put ASoC: SOF: pcm: remove warning - initialize workqueue on open ASoC: SOF: pcm: clear hw_params_upon_resume flag correctly ASoC: SOF: core: fix error handling with the probe workqueue ASoC: SOF: core: remove snd_soc_unregister_component in case of error ASoC: SOF: core: remove DSP after unregistering machine driver ASoC: soc-core: fixup references at soc_cleanup_card_resources() arm64/module: revert to unsigned interpretation of ABS16/32 relocations KVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_ID kvm: fix compile on s390 part 2 xprtrdma: Use struct_size() in kzalloc() tools headers UAPI: Sync kvm.h headers with the kernel sources perf record: Fix s390 missing module symbol and warning for non-root users perf machine: Read also the end of the kernel perf test vmlinux-kallsyms: Ignore aliases to _etext when searching on kallsyms perf session: Add missing swap ops for namespace events perf namespace: Protect reading thread's namespace tools headers UAPI: Sync drm/drm.h with the kernel s390/crypto: fix gcm-aes-s390 selftest failures s390/zcrypt: Fix wrong dispatching for control domain CPRBs s390/pci: fix assignment of bus resources s390/pci: fix struct definition for set PCI function s390: mark __cpacf_check_opcode() and cpacf_query_func() as __always_inline s390: add unreachable() to dump_fault_info() to fix -Wmaybe-uninitialized tools headers UAPI: Sync drm/i915_drm.h with the kernel tools headers UAPI: Sync linux/fs.h with the kernel tools headers UAPI: Sync linux/sched.h with the kernel tools arch x86: Sync asm/cpufeatures.h with the with the kernel tools include UAPI: Update copy of files related to new fspick, fsmount, fsconfig, fsopen, move_mount and open_tree syscalls perf arm64: Fix mksyscalltbl when system kernel headers are ahead of the kernel perf data: Fix 'strncat may truncate' build failure with recent gcc arm64: Fix the arm64_personality() syscall wrapper redirection rtw88: Make some symbols static rtw88: avoid circular locking between local->iflist_mtx and rtwdev->mutex rsi: Properly initialize data in rsi_sdio_ta_reset rtw88: fix unassigned rssi_level in rtw_sta_info rtw88: fix subscript above array bounds compiler warning fuse: extract helper for range writeback fuse: fix copy_file_range() in the writeback case mmc: meson-gx: fix irq ack mmc: tmio: fix SCC error handling to avoid false positive CRC error mmc: tegra: Fix a warning message memstick: mspro_block: Fix an error code in mspro_block_issue_req() mac80211: mesh: fix RCU warning nl80211: fix station_info pertid memory leak mac80211: Do not use stack memory with scatterlist for GMAC ALSA: line6: Assure canceling delayed work at disconnection configfs: Fix use-after-free when accessing sd->s_dentry ALSA: hda - Force polling mode on CNL for fixing codec communication i2c: synquacer: fix synquacer_i2c_doxfer() return value i2c: mlxcpld: Fix wrong initialization order in probe i2c: dev: fix potential memory leak in i2cdev_ioctl_rdwr RDMA/core: Fix panic when port_data isn't initialized RDMA/uverbs: Pass udata on uverbs error unwind RDMA/core: Clear out the udata before error unwind net: aquantia: tcp checksum 0xffff being handled incorrectly net: aquantia: fix LRO with FCS error net: aquantia: check rx csum for all packets in LRO session net: aquantia: tx clean budget logic error vhost: scsi: add weight support vhost: vsock: add weight support vhost_net: fix possible infinite loop vhost: introduce vhost_exceeds_weight() virtio: Fix indentation of VIRTIO_MMIO virtio: add unlikely() to WARN_ON_ONCE() iommu/vt-d: Set the right field for Page Walk Snoop iommu/vt-d: Fix lock inversion between iommu->lock and device_domain_lock iommu: Add missing new line for dma type drm/etnaviv: lock MMU while dumping core block: Don't revalidate bdev of hidden gendisk loop: Don't change loop device under exclusive opener drm/imx: ipuv3-plane: fix atomic update status query for non-plus i.MX6Q drm/qxl: drop WARN_ONCE() iio: temperature: mlx90632 Relax the compatibility check iio: imu: st_lsm6dsx: fix PM support for st_lsm6dsx i2c controller staging:iio:ad7150: fix threshold mode config bit fuse: add FUSE_WRITE_KILL_PRIV fuse: fallocate: fix return with locked inode PCI: PM: Avoid possible suspend-to-idle issue ACPI: PM: Call pm_set_suspend_via_firmware() during hibernation ACPI/PCI: PM: Add missing wakeup.flags.valid checks ovl: support the FS_IOC_FS[SG]ETXATTR ioctls soundwire: stream: fix out of boundary access on port properties net: tulip: de4x5: Drop redundant MODULE_DEVICE_TABLE() selftests/tls: add test for sleeping even though there is data net/tls: fix no wakeup on partial reads selftests/tls: test for lowat overshoot with multiple records net/tls: fix lowat calculation if some data came from previous record dpaa2-eth: Make constant 64-bit long dpaa2-eth: Use PTR_ERR_OR_ZERO where appropriate dpaa2-eth: Fix potential spectre issue bonding/802.3ad: fix slave link initialization transition states io_uring: Fix __io_uring_register() false success net: ethtool: Document get_rxfh_context and set_rxfh_context ethtool ops net: stmmac: dwmac-mediatek: modify csr_clk value to fix mdio read/write fail net: stmmac: fix csr_clk can't be zero issue net: stmmac: update rx tail pointer register to fix rx dma hang issue. ip_sockglue: Fix missing-check bug in ip_ra_control() ipv6_sockglue: Fix a missing-check bug in ip6_ra_control() efi: Allow the number of EFI configuration tables entries to be zero efi/x86/Add missing error handling to old_memmap 1:1 mapping code parisc: Fix compiler warnings in float emulation code parisc/slab: cleanup after /proc/slab_allocators removal bpf: sockmap, fix use after free from sleep in psock backlog workqueue net: sched: don't use tc_action->order during action dump cxgb4: Revert "cxgb4: Remove SGE_HOST_PAGE_SIZE dependency on page size" net: fec: fix the clk mismatch in failed_reset path habanalabs: Avoid using a non-initialized MMU cache mutex habanalabs: fix debugfs code uapi/habanalabs: add opcode for enable/disable device debug mode habanalabs: halt debug engines on user process close selftests: rtc: rtctest: specify timeouts selftests/harness: Allow test to configure timeout selftests/ftrace: Add checkbashisms meta-testcase selftests/ftrace: Make a script checkbashisms clean media: smsusb: better handle optional alignment test_firmware: Use correct snprintf() limit genwqe: Prevent an integer overflow in the ioctl parport: Fix mem leak in parport_register_dev_model fpga: dfl: expand minor range when registering chrdev region fpga: dfl: Add lockdep classes for pdata->lock fpga: dfl: afu: Pass the correct device to dma_mapping_error() fpga: stratix10-soc: fix use-after-free on s10_init() w1: ds2408: Fix typo after 49695ac468 (reset on output_write retry with readback) kheaders: Do not regenerate archive if config is not changed kheaders: Move from proc to sysfs drm/amd/display: Don't load DMCU for Raven 1 (v2) drm/i915: Maintain consistent documentation subsection ordering scripts/sphinx-pre-install: make it handle Sphinx versions docs: Fix conf.py for Sphinx 2.0 vt/fbcon: deinitialize resources in visual_init() after failed memory allocation xfs: fix broken log reservation debugging clocksource/drivers/timer-ti-dm: Change to new style declaration ASoC: core: lock client_mutex while removing link components ASoC: simple-card: Restore original configuration of DAI format {nl,mac}80211: allow 4addr AP operation on crypto controlled devices mac80211_hwsim: mark expected switch fall-through mac80211: fix rate reporting inside cfg80211_calculate_bitrate_he() mac80211: remove set but not used variable 'old' mac80211: handle deauthentication/disassociation from TDLS peer gpio: fix gpio-adp5588 build errors pinctrl: stmfx: Fix compile issue when CONFIG_OF_GPIO is not defined staging: kpc2000: Add dependency on MFD_CORE to kconfig symbol 'KPC2000' perf/ring-buffer: Use regular variables for nesting perf/ring-buffer: Always use {READ,WRITE}_ONCE() for rb->user_page data perf/ring_buffer: Add ordering to rb->nest increment perf/ring_buffer: Fix exposing a temporarily decreased data_head x86/CPU/AMD: Don't force the CPB cap when running under a hypervisor x86/boot: Provide KASAN compatible aliases for string routines ALSA: hda/realtek - Enable micmute LED for Huawei laptops Input: uinput - add compat ioctl number translation for UI_*_FF_UPLOAD Input: silead - add MSSL0017 to acpi_device_id cxgb4: offload VLAN flows regardless of VLAN ethtype hsr: fix don't prune the master node from the node_db net: mvpp2: cls: Fix leaked ethtool_rx_flow_rule docs: fix multiple doc build warnings in enumeration.rst lib/list_sort: fix kerneldoc build error docs: fix numaperf.rst and add it to the doc tree doc: Cope with the deprecation of AutoReporter doc: Cope with Sphinx logging deprecations bpf: sockmap, restore sk_write_space when psock gets dropped selftests: bpf: add zero extend checks for ALU32 and/or/xor bpf, riscv: clear target register high 32-bits for and/or/xor on ALU32 spi: abort spi_sync if failed to prepare_transfer_hardware ALSA: hda/realtek - Set default power save node to 0 ipv4/igmp: fix build error if !CONFIG_IP_MULTICAST powerpc/kexec: Fix loading of kernel + initramfs with kexec_file_load() MIPS: TXx9: Fix boot crash in free_initmem() MIPS: remove a space after -I to cope with header search paths for VDSO MIPS: mark ginvt() as __always_inline ipv4/igmp: fix another memory leak in igmpv3_del_delrec() bnxt_en: Device serial number is supported only for PFs. bnxt_en: Reduce memory usage when running in kdump kernel. bnxt_en: Fix possible BUG() condition when calling pci_disable_msix(). bnxt_en: Fix aggregation buffer leak under OOM condition. ipv6: Fix redirect with VRF net: stmmac: fix reset gpio free missing mISDN: make sure device name is NUL terminated net: macb: save/restore the remaining registers and features media: dvb: warning about dvb frequency limits produces too much noise net/tls: don't ignore netdev notifications if no TLS features net/tls: fix state removal with feature flags off net/tls: avoid NULL-deref on resync during device removal Documentation: add TLS offload documentation Documentation: tls: RSTify the ktls documentation Documentation: net: move device drivers docs to a submenu mISDN: Fix indenting in dsp_cmx.c ocelot: Dont allocate another multicast list, use __dev_mc_sync Validate required parameters in inet6_validate_link_af xhci: Use %zu for printing size_t type xhci: Convert xhci_handshake() to use readl_poll_timeout_atomic() xhci: Fix immediate data transfer if buffer is already DMA mapped usb: xhci: avoid null pointer deref when bos field is NULL usb: xhci: Fix a potential null pointer dereference in xhci_debugfs_create_endpoint() xhci: update bounce buffer with correct sg num media: usb: siano: Fix false-positive "uninitialized variable" warning spi: spi-fsl-spi: call spi_finalize_current_message() at the end ALSA: hda/realtek - Check headset type by unplug and resume powerpc/perf: Fix MMCRA corruption by bhrb_filter powerpc/powernv: Return for invalid IMC domain HID: logitech-hidpp: Add support for the S510 remote control HID: multitouch: handle faulty Elo touch device selftests: netfilter: add flowtable test script netfilter: nft_flow_offload: IPCB is only valid for ipv4 family netfilter: nft_flow_offload: don't offload when sequence numbers need adjustment netfilter: nft_flow_offload: set liberal tracking mode for tcp netfilter: nf_flow_table: ignore DF bit setting ASoC: Intel: sof-rt5682: fix AMP quirk support ASoC: Intel: sof-rt5682: fix for codec button mapping clk: ti: clkctrl: Fix clkdm_clk handling clk: imx: imx8mm: fix int pll clk gate clk: sifive: restrict Kconfig scope for the FU540 PRCI driver RDMA/hns: Fix PD memory leak for internal allocation netfilter: nat: fix udp checksum corruption selftests: netfilter: missing error check when setting up veth interface RDMA/srp: Rename SRP sysfs name after IB device rename trigger ipvs: Fix use-after-free in ip_vs_in ARC: [plat-hsdk]: Add missing FIFO size entry in GMAC node ARC: [plat-hsdk]: Add missing multicast filter bins number to GMAC node samples, bpf: suppress compiler warning samples, bpf: fix to change the buffer size for read() bpf: Check sk_fullsock() before returning from bpf_sk_lookup() bpf: fix out-of-bounds read in __bpf_skc_lookup Documentation/networking: fix af_xdp.rst Sphinx warnings netfilter: nft_fib: Fix existence check support netfilter: nf_queue: fix reinject verdict handling dmaengine: sprd: Add interrupt support for 2-stage transfer dmaengine: sprd: Fix the right place to configure 2-stage transfer dmaengine: sprd: Fix block length overflow dmaengine: sprd: Fix the incorrect start for 2-stage destination channels dmaengine: sprd: Add validation of current descriptor in irq handler dmaengine: sprd: Fix the possible crash when getting descriptor status tty: max310x: Fix external crystal register setup serial: sh-sci: disable DMA for uart_console serial: imx: remove log spamming error message tty: serial: msm_serial: Fix XON/XOFF USB: serial: option: add Telit 0x1260 and 0x1261 compositions USB: serial: pl2303: add Allied Telesis VT-Kit3 USB: serial: option: add support for Simcom SIM7500/SIM7600 RNDIS mode dmaengine: tegra210-adma: Fix spelling dmaengine: tegra210-adma: Fix channel FIFO configuration dmaengine: tegra210-adma: Fix crash during probe dmaengine: mediatek-cqdma: sleeping in atomic context dmaengine: dw-axi-dmac: fix null dereference when pointer first is null perf/x86/intel/ds: Fix EVENT vs. UEVENT PEBS constraints USB: rio500: update Documentation USB: rio500: simplify locking USB: rio500: fix memory leak in close after disconnect USB: rio500: refuse more than one device at a time usbip: usbip_host: fix BUG: sleeping function called from invalid context USB: sisusbvga: fix oops in error path of sisusb_probe USB: Add LPM quirk for Surface Dock GigE adapter media: usb: siano: Fix general protection fault in smsusb usb: mtu3: fix up undefined reference to usb_debug_root USB: Fix slab-out-of-bounds write in usb_get_bos_descriptor Input: elantech - enable middle button support on 2 ThinkPads dmaengine: fsl-qdma: Add improvement dmaengine: jz4780: Fix transfers being ACKed too soon gcc-plugins: Fix build failures under Darwin host MAINTAINERS: Update Stefan Wahren email address netfilter: nf_tables: fix oops during rule dump ARC: mm: SIGSEGV userspace trying to access kernel virtual memory ARC: fix build warnings ARM: dts: bcm: Add missing device_type = "memory" property soc: bcm: brcmstb: biuctrl: Register writes require a barrier soc: brcmstb: Fix error path for unsupported CPUs ARM: dts: dra71x: Disable usb4_tm target module ARM: dts: dra71x: Disable rtc target module ARM: dts: dra76x: Disable usb4_tm target module ARM: dts: dra76x: Disable rtc target module ASoC: simple-card: Fix configuration of DAI format ASoC: Intel: soc-acpi: Fix machine selection order ASoC: rt5677-spi: Handle over reading when flipping bytes ASoC: soc-dpm: fixup DAI active unbalance pinctrl: intel: Clear interrupt status in mask/unmask callback pinctrl: intel: Use GENMASK() consistently parisc: Allow building 64-bit kernel without -mlong-calls compiler option parisc: Kconfig: remove ARCH_DISCARD_MEMBLOCK staging: wilc1000: Fix some double unlock bugs in wilc_wlan_cleanup() staging: vc04_services: prevent integer overflow in create_pagelist() Staging: vc04_services: Fix a couple error codes staging: wlan-ng: fix adapter initialization failure staging: kpc2000: double unlock in error handling in kpc_dma_transfer() staging: kpc2000: Fix build error without CONFIG_UIO staging: kpc2000: fix build error on xtensa staging: erofs: set sb->s_root to NULL when failing from __getname() ARM: imx: cpuidle-imx6sx: Restrict the SW2ISO increase to i.MX6SX firmware: imx: SCU irq should ONLY be enabled after SCU IPC is ready arm64: imx: Fix build error without CONFIG_SOC_BUS ima: fix wrong signed policy requirement when not appraising x86/ima: Check EFI_RUNTIME_SERVICES before using stacktrace: Unbreak stack_trace_save_tsk_reliable() HID: wacom: Sync INTUOSP2_BT touch state after each frame if necessary HID: wacom: Correct button numbering 2nd-gen Intuos Pro over Bluetooth HID: wacom: Send BTN_TOUCH in response to INTUOSP2_BT eraser contact HID: wacom: Don't report anything prior to the tool entering range HID: wacom: Don't set tool type until we're in range ASoC: cs42xx8: Add regcache mask dirty regulator: tps6507x: Fix boot regression due to testing wrong init_data pointer ASoC: fsl_asrc: Fix the issue about unsupported rate spi: bitbang: Fix NULL pointer dereference in spi_unregister_master Input: elan_i2c - increment wakeup count if wake source wireless: Skip directory when generating certificates ASoC: ak4458: rstn_control - return a non-zero on error only ASoC: soc-pcm: BE dai needs prepare when pause release after resume ASoC: ak4458: add return value for ak4458_probe ASoC : cs4265 : readable register too low ASoC: SOF: fix error in verbose ipc command parsing ASoC: SOF: fix race in FW boot timeout handling ASoC: SOF: nocodec: fix undefined reference iio: adc: ti-ads8688: fix timestamp is not updated in buffer iio: dac: ds4422/ds4424 fix chip verification HID: rmi: Use SET_REPORT request on control endpoint for Acer Switch 3 and 5 HID: logitech-hidpp: add support for the MX5500 keyboard HID: logitech-dj: add support for the Logitech MX5500's Bluetooth Mini-Receiver HID: i2c-hid: add iBall Aer3 to descriptor override spi: Fix Raspberry Pi breakage ARM: dts: dra76x: Update MMC2_HS200_MANUAL1 iodelay values ARM: dts: am57xx-idk: Remove support for voltage switching for SD card bus: ti-sysc: Handle devices with no control registers ARM: dts: Configure osc clock for d_can on am335x iio: imu: mpu6050: Fix FIFO layout for ICM20602 lkdtm/bugs: Adjust recursion test to avoid elision lkdtm/usercopy: Moves the KERNEL_DS test to non-canonical iio: adc: ads124: avoid buffer overflow iio: adc: modify NPCM ADC read reference voltage Change-Id: I98c823993370027391cc21dfb239c3049f025136 Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>	2019-07-01 17:41:24 -07:00
Yafang Shao	163363455b	tracing: introduce TRACE_EVENT_NOP() ... Sometimes we want to define a tracepoint as a do-nothing function. So I introduce TRACE_EVENT_NOP, DECLARE_EVENT_CLASS_NOP and DEFINE_EVENT_NOP for this kind of usage. Link: http://lkml.kernel.org/r/1553602391-11926-2-git-send-email-laoar.shao@gmail.com Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2019-04-08 09:22:51 -04:00
Ingo Molnar	4bbfd7467c	Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu ... Pull RCU changes from Paul E. McKenney: - Convert RCU's BUG_ON() and similar calls to WARN_ON() and similar. - Replace calls of RCU-bh and RCU-sched update-side functions to their vanilla RCU counterparts. This series is a step towards complete removal of the RCU-bh and RCU-sched update-side functions. ( Note that some of these conversions are going upstream via their respective maintainers. ) - Documentation updates, including a number of flavor-consolidation updates from Joel Fernandes. - Miscellaneous fixes. - Automate generation of the initrd filesystem used for rcutorture testing. - Convert spin_is_locked() assertions to instead use lockdep. ( Note that some of these conversions are going upstream via their respective maintainers. ) - SRCU updates, especially including a fix from Dennis Krein for a bag-on-head-class bug. - RCU torture-test updates. Signed-off-by: Ingo Molnar <mingo@kernel.org>	2018-12-04 07:52:30 +01:00
Zenghui Yu	0c7a52e4d4	tracepoint: Use __idx instead of idx in DO_TRACE macro to make it unique ... After enabling KVM event tracing, almost all of trace_kvm_exit()'s printk shows "kvm_exit: IRQ: ..." even if the actual exception_type is NOT IRQ. More specifically, trace_kvm_exit() is defined in virt/kvm/arm/trace.h by TRACE_EVENT. This slight problem may have existed after commit e6753f23d9 ("tracepoint: Make rcuidle tracepoint callers use SRCU"). There are two variables in trace_kvm_exit() and __DO_TRACE() which have the same name, *idx*. Thus the actual value of *idx* will be overwritten when tracing. Fix it by adding a simple prefix. Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Wang Haibin <wanghaibin.wang@huawei.com> Cc: linux-trace-devel@vger.kernel.org Cc: stable@vger.kernel.org Fixes: e6753f23d9 ("tracepoint: Make rcuidle tracepoint callers use SRCU") Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Zenghui Yu <yuzenghui@huawei.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2018-11-29 22:08:38 -05:00
Paul E. McKenney	7440172974	tracing: Replace synchronize_sched() and call_rcu_sched() ... Now that synchronize_rcu() waits for preempt-disable regions of code as well as RCU read-side critical sections, synchronize_sched() can be replaced by synchronize_rcu(). Similarly, call_rcu_sched() can be replaced by call_rcu(). This commit therefore makes these changes. Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: <linux-kernel@vger.kernel.org> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2018-11-27 09:21:41 -08:00
Mathieu Desnoyers	9c0be3f6b5	tracepoint: Fix tracepoint array element size mismatch ... commit 46e0c9be20 ("kernel: tracepoints: add support for relative references") changes the layout of the __tracepoint_ptrs section on architectures supporting relative references. However, it does so without turning struct tracepoint * const into const int elsewhere in the tracepoint code, which has the following side-effect: Setting mod->num_tracepoints is done in by module.c: mod->tracepoints_ptrs = section_objs(info, "__tracepoints_ptrs", sizeof(*mod->tracepoints_ptrs), &mod->num_tracepoints); Basically, since sizeof(*mod->tracepoints_ptrs) is a pointer size (rather than sizeof(int)), num_tracepoints is erroneously set to half the size it should be on 64-bit arch. So a module with an odd number of tracepoints misses the last tracepoint due to effect of integer division. So in the module going notifier: for_each_tracepoint_range(mod->tracepoints_ptrs, mod->tracepoints_ptrs + mod->num_tracepoints, tp_module_going_check_quiescent, NULL); the expression (mod->tracepoints_ptrs + mod->num_tracepoints) actually evaluates to something within the bounds of the array, but miss the last tracepoint if the number of tracepoints is odd on 64-bit arch. Fix this by introducing a new typedef: tracepoint_ptr_t, which is either "const int" on architectures that have PREL32 relocations, or "struct tracepoint * const" on architectures that does not have this feature. Also provide a new tracepoint_ptr_defer() static inline to encapsulate deferencing this type rather than duplicate code and ugly idefs within the for_each_tracepoint_range() implementation. This issue appears in 4.19-rc kernels, and should ideally be fixed before the end of the rc cycle. Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Jessica Yu <jeyu@kernel.org> Link: http://lkml.kernel.org/r/20181013191050.22389-1-mathieu.desnoyers@efficios.com Link: http://lkml.kernel.org/r/20180704083651.24360-7-ard.biesheuvel@linaro.org Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Ingo Molnar <mingo@kernel.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: James Morris <james.morris@microsoft.com> Cc: James Morris <jmorris@namei.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Nicolas Pitre <nico@linaro.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Russell King <linux@armlinux.org.uk> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Thomas Garnier <thgarnie@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will.deacon@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2018-10-17 15:35:29 -04:00
Steven Rostedt (VMware)	865e63b04e	tracing: Add back in rcu_irq_enter/exit_irqson() for rcuidle tracepoints ... Borislav reported the following splat: ============================= WARNING: suspicious RCU usage 4.19.0-rc1+ #1 Not tainted ----------------------------- ./include/linux/rcupdate.h:631 rcu_read_lock() used illegally while idle! other info that might help us debug this: RCU used illegally from idle CPU! rcu_scheduler_active = 2, debug_locks = 1 RCU used illegally from extended quiescent state! 1 lock held by swapper/0/0: #0: 000000004557ee0e (rcu_read_lock){....}, at: perf_event_output_forward+0x0/0x130 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc1+ #1 Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012 Call Trace: dump_stack+0x85/0xcb perf_event_output_forward+0xf6/0x130 __perf_event_overflow+0x52/0xe0 perf_swevent_overflow+0x91/0xb0 perf_tp_event+0x11a/0x350 ? find_held_lock+0x2d/0x90 ? __lock_acquire+0x2ce/0x1350 ? __lock_acquire+0x2ce/0x1350 ? retint_kernel+0x2d/0x2d ? find_held_lock+0x2d/0x90 ? tick_nohz_get_sleep_length+0x83/0xb0 ? perf_trace_cpu+0xbb/0xd0 ? perf_trace_buf_alloc+0x5a/0xa0 perf_trace_cpu+0xbb/0xd0 cpuidle_enter_state+0x185/0x340 do_idle+0x1eb/0x260 cpu_startup_entry+0x5f/0x70 start_kernel+0x49b/0x4a6 secondary_startup_64+0xa4/0xb0 This is due to the tracepoints moving to SRCU usage which does not require RCU to be "watching". But perf uses these tracepoints with RCU and expects it to be. Hence, we still need to add in the rcu_irq_enter/exit_irqson() calls for "rcuidle" tracepoints. This is a temporary fix until we have SRCU working in NMI context, and then perf can be converted to use that instead of normal RCU. Link: http://lkml.kernel.org/r/20180904162611.6a120068@gandalf.local.home Cc: x86-ml <x86@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Reported-by: Borislav Petkov <bp@alien8.de> Tested-by: Borislav Petkov <bp@alien8.de> Reviewed-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Fixes: e6753f23d9 ("tracepoint: Make rcuidle tracepoint callers use SRCU") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2018-09-05 11:23:21 -04:00
Ard Biesheuvel	46e0c9be20	kernel: tracepoints: add support for relative references ... To avoid the need for relocating absolute references to tracepoint structures at boot time when running relocatable kernels (which may take a disproportionate amount of space), add the option to emit these tables as relative references instead. Link: http://lkml.kernel.org/r/20180704083651.24360-7-ard.biesheuvel@linaro.org Acked-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: James Morris <james.morris@microsoft.com> Cc: James Morris <jmorris@namei.org> Cc: Jessica Yu <jeyu@kernel.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Nicolas Pitre <nico@linaro.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Petr Mladek <pmladek@suse.com> Cc: Russell King <linux@armlinux.org.uk> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Thomas Garnier <thgarnie@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2018-08-22 10:52:47 -07:00
Joel Fernandes (Google)	e6753f23d9	tracepoint: Make rcuidle tracepoint callers use SRCU ... In recent tests with IRQ on/off tracepoints, a large performance overhead ~10% is noticed when running hackbench. This is root caused to calls to rcu_irq_enter_irqson and rcu_irq_exit_irqson from the tracepoint code. Following a long discussion on the list [1] about this, we concluded that srcu is a better alternative for use during rcu idle. Although it does involve extra barriers, its lighter than the sched-rcu version which has to do additional RCU calls to notify RCU idle about entry into RCU sections. In this patch, we change the underlying implementation of the trace_*_rcuidle API to use SRCU. This has shown to improve performance alot for the high frequency irq enable/disable tracepoints. Test: Tested idle and preempt/irq tracepoints. Here are some performance numbers: With a run of the following 30 times on a single core x86 Qemu instance with 1GB memory: hackbench -g 4 -f 2 -l 3000 Completion times in seconds. CONFIG_PROVE_LOCKING=y. No patches (without this series) Mean: 3.048 Median: 3.025 Std Dev: 0.064 With Lockdep using irq tracepoints with RCU implementation: Mean: 3.451 (-11.66 %) Median: 3.447 (-12.22%) Std Dev: 0.049 With Lockdep using irq tracepoints with SRCU implementation (this series): Mean: 3.020 (I would consider the improvement against the "without this series" case as just noise). Median: 3.013 Std Dev: 0.033 [1] https://patchwork.kernel.org/patch/10344297/ [remove rcu_read_lock_sched_notrace as its the equivalent of preempt_disable_notrace and is unnecessary to call in tracepoint code] Link: http://lkml.kernel.org/r/20180730222423.196630-3-joel@joelfernandes.org Cleaned-up-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> [ Simplified WARN_ON_ONCE() ] Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2018-07-30 19:13:03 -04:00
Mauro Carvalho Chehab	ec15872daa	docs: fix broken references with multiple hints ... The script: ./scripts/documentation-file-ref-check --fix Gives multiple hints for broken references on some files. Manually use the one that applies for some files. Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Acked-by: James Morris <james.morris@microsoft.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Jonathan Corbet <corbet@lwn.net>	2018-06-15 18:10:01 -03:00
Paul E. McKenney	844ccdd7dc	rcu: Eliminate rcu_irq_enter_disabled() ... Now that the irq path uses the rcu_nmi_{enter,exit}() algorithm, rcu_irq_enter() and rcu_irq_exit() may be used from any context. There is thus no need for rcu_irq_enter_disabled() and for the checks using it. This commit therefore eliminates rcu_irq_enter_disabled(). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>	2017-11-27 08:42:03 -08:00
Jeremy Linton	4f0dfd76e9	tracing: define TRACE_DEFINE_SIZEOF() macro to map sizeof's to their values ... Perf has a problem that if sizeof() macros are used within TRACE_EVENT() macro's they end up in userspace as "sizeof(kernel structure)" which cannot properly be parsed. Add a macro which can forward this data through the eval_map for userspace utilization. Link: http://lkml.kernel.org/r/20170531215653.3240-10-jeremy.linton@arm.com Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2017-06-13 17:10:57 -04:00
Jeremy Linton	00f4b652b6	trace: rename trace_enum_map to trace_eval_map ... Each enum is loaded into the trace_enum_map, as we are now using this for more than enums rename it. Link: http://lkml.kernel.org/r/20170531215653.3240-3-jeremy.linton@arm.com Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2017-06-13 17:08:57 -04:00
Steven Rostedt (VMware)	d54b6eeb55	tracing: Make sure rcu_irq_enter() can work for trace_*_rcuidle() trace events ... Stack tracing discovered that there's a small location inside the RCU infrastructure where calling rcu_irq_enter() does not work. As trace events use rcu_irq_enter() it must make sure that it is functionable. A check against rcu_irq_enter_disabled() is added with a WARN_ON_ONCE() as no trace event should ever be used in that part of RCU. If the warning is triggered, then the trace event is ignored. Restructure the __DO_TRACE() a bit to get rid of the prercu and postrcu, and just have an rcucheck that does the work from within the _DO_TRACE() macro. gcc optimization will compile out the rcucheck=0 case. Link: http://lkml.kernel.org/r/20170405093207.404f8deb@gandalf.local.home Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>	2017-04-10 15:22:17 -04:00
Steven Rostedt (Red Hat)	8cf868affd	tracing: Have the reg function allow to fail ... Some tracepoints have a registration function that gets enabled when the tracepoint is enabled. There may be cases that the registraction function must fail (for example, can't allocate enough memory). In this case, the tracepoint should also fail to register, otherwise the user would not know why the tracepoint is not working. Cc: David Howells <dhowells@redhat.com> Cc: Seiji Aguchi <seiji.aguchi@hds.com> Cc: Anton Blanchard <anton@samba.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2016-12-09 09:13:30 -05:00
Steven Rostedt (Red Hat)	dc17147de3	tracing: Fix check for cpu online when event is disabled ... Commit f37755490f ("tracepoints: Do not trace when cpu is offline") added a check to make sure that tracepoints only get called when the cpu is online, as it uses rcu_read_lock_sched() for protection. Commit 3a630178fd ("tracing: generate RCU warnings even when tracepoints are disabled") added lockdep checks (including rcu checks) for events that are not enabled to catch possible RCU issues that would only be triggered if a trace event was enabled. Commit f37755490f only stopped the warnings when the trace event was enabled but did not prevent warnings if the trace event was called when disabled. To fix this, the cpu online check is moved to where the condition is added to the trace event. This will place the cpu online check in all places that it may be used now and in the future. Cc: stable@vger.kernel.org # v3.18+ Fixes: f37755490f ("tracepoints: Do not trace when cpu is offline") Fixes: 3a630178fd ("tracing: generate RCU warnings even when tracepoints are disabled") Reported-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2016-03-09 11:58:41 -05:00
Steven Rostedt (Red Hat)	f37755490f	tracepoints: Do not trace when cpu is offline ... The tracepoint infrastructure uses RCU sched protection to enable and disable tracepoints safely. There are some instances where tracepoints are used in infrastructure code (like kfree()) that get called after a CPU is going offline, and perhaps when it is coming back online but hasn't been registered yet. This can probuce the following warning: [ INFO: suspicious RCU usage. ] 4.4.0-00006-g0fe53e8-dirty #34 Tainted: G S ------------------------------- include/trace/events/kmem.h:141 suspicious rcu_dereference_check() usage! other info that might help us debug this: RCU used illegally from offline CPU! rcu_scheduler_active = 1, debug_locks = 1 no locks held by swapper/8/0. stack backtrace: CPU: 8 PID: 0 Comm: swapper/8 Tainted: G S 4.4.0-00006-g0fe53e8-dirty #34 Call Trace: [c0000005b76c78d0] [c0000000008b9540] .dump_stack+0x98/0xd4 (unreliable) [c0000005b76c7950] [c00000000010c898] .lockdep_rcu_suspicious+0x108/0x170 [c0000005b76c79e0] [c00000000029adc0] .kfree+0x390/0x440 [c0000005b76c7a80] [c000000000055f74] .destroy_context+0x44/0x100 [c0000005b76c7b00] [c0000000000934a0] .__mmdrop+0x60/0x150 [c0000005b76c7b90] [c0000000000e3ff0] .idle_task_exit+0x130/0x140 [c0000005b76c7c20] [c000000000075804] .pseries_mach_cpu_die+0x64/0x310 [c0000005b76c7cd0] [c000000000043e7c] .cpu_die+0x3c/0x60 [c0000005b76c7d40] [c0000000000188d8] .arch_cpu_idle_dead+0x28/0x40 [c0000005b76c7db0] [c000000000101e6c] .cpu_startup_entry+0x50c/0x560 [c0000005b76c7ed0] [c000000000043bd8] .start_secondary+0x328/0x360 [c0000005b76c7f90] [c000000000008a6c] start_secondary_prolog+0x10/0x14 This warning is not a false positive either. RCU is not protecting code that is being executed while the CPU is offline. Instead of playing "whack-a-mole(TM)" and adding conditional statements to the tracepoints we find that are used in this instance, simply add a cpu_online() test to the tracepoint code where the tracepoint will be ignored if the CPU is offline. Use of raw_smp_processor_id() is fine, as there should never be a case where the tracepoint code goes from running on a CPU that is online and suddenly gets migrated to a CPU that is offline. Link: http://lkml.kernel.org/r/1455387773-4245-1-git-send-email-kda@linux-powerpc.org Reported-by: Denis Kirjanov <kda@linux-powerpc.org> Fixes: 97e1c18e8d ("tracing: Kernel Tracepoints") Cc: stable@vger.kernel.org # v2.6.28+ Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2016-02-15 13:04:46 -05:00
Linus Torvalds	c17488d066	Merge tag 'trace-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace ... Pull tracing updates from Steven Rostedt: "Not much new with tracing for this release. Mostly just clean ups and minor fixes. Here's what else is new: - A new TRACE_EVENT_FN_COND macro, combining both _FN and _COND for those that want both. - New selftest to test the instance create and delete - Better debug output when ftrace fails" * tag 'trace-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (24 commits) ftrace: Fix the race between ftrace and insmod ftrace: Add infrastructure for delayed enabling of module functions x86: ftrace: Fix the comments for ftrace_modify_code_direct() tracing: Fix comment to use tracing_on over tracing_enable metag: ftrace: Fix the comments for ftrace_modify_code sh: ftrace: Fix the comments for ftrace_modify_code() ia64: ftrace: Fix the comments for ftrace_modify_code() ftrace: Clean up ftrace_module_init() code ftrace: Join functions ftrace_module_init() and ftrace_init_module() tracing: Introduce TRACE_EVENT_FN_COND macro tracing: Use seq_buf_used() in seq_buf_to_user() instead of len bpf: Constify bpf_verifier_ops structure ftrace: Have ftrace_ops_get_func() handle RCU and PER_CPU flags too ftrace: Remove use of control list and ops ftrace: Fix output of enabled_functions for showing tramp ftrace: Fix a typo in comment ftrace: Show all tramps registered to a record on ftrace_bug() ftrace: Add variable ftrace_expected for archs to show expected code ftrace: Add new type to distinguish what kind of ftrace_bug() tracing: Update cond flag when enabling or disabling a trigger ...	2016-01-12 20:04:15 -08:00
Linus Torvalds	5cb52b5e16	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip ... Pull perf updates from Ingo Molnar: "Kernel side changes: - Intel Knights Landing support. (Harish Chegondi) - Intel Broadwell-EP uncore PMU support. (Kan Liang) - Core code improvements. (Peter Zijlstra.) - Event filter, LBR and PEBS fixes. (Stephane Eranian) - Enable cycles:pp on Intel Atom. (Stephane Eranian) - Add cycles:ppp support for Skylake. (Andi Kleen) - Various x86 NMI overhead optimizations. (Andi Kleen) - Intel PT enhancements. (Takao Indoh) - AMD cache events fix. (Vince Weaver) Tons of tooling changes: - Show random perf tool tips in the 'perf report' bottom line (Namhyung Kim) - perf report now defaults to --group if the perf.data file has grouped events, try it with: # perf record -e '{cycles,instructions}' -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 1.093 MB perf.data (1247 samples) ] # perf report # Samples: 1K of event 'anon group { cycles, instructions }' # Event count (approx.): 1955219195 # # Overhead Command Shared Object Symbol 2.86% 0.22% swapper [kernel.kallsyms] [k] intel_idle 1.05% 0.33% firefox libxul.so [.] js::SetObjectElement 1.05% 0.00% kworker/0:3 [kernel.kallsyms] [k] gen6_ring_get_seqno 0.88% 0.17% chrome chrome [.] 0x0000000000ee27ab 0.65% 0.86% firefox libxul.so [.] js::ValueToId<(js::AllowGC)1> 0.64% 0.23% JS Helper libxul.so [.] js::SplayTree<js::jit::LiveRange*, js::jit::LiveRange>::splay 0.62% 1.27% firefox libxul.so [.] js::GetIterator 0.61% 1.74% firefox libxul.so [.] js::NativeSetProperty 0.61% 0.31% firefox libxul.so [.] js::SetPropertyByDefining - Introduce the 'perf stat record/report' workflow: Generate perf.data files from 'perf stat', to tap into the scripting capabilities perf has instead of defining a 'perf stat' specific scripting support to calculate event ratios, etc. Simple example: $ perf stat record -e cycles usleep 1 Performance counter stats for 'usleep 1': 1,134,996 cycles 0.000670644 seconds time elapsed $ perf stat report Performance counter stats for '/home/acme/bin/perf stat record -e cycles usleep 1': 1,134,996 cycles 0.000670644 seconds time elapsed $ It generates PERF_RECORD_ userspace records to store the details: $ perf report -D | grep PERF_RECORD 0xf0 [0x28]: PERF_RECORD_THREAD_MAP nr: 1 thread: 27637 0x118 [0x12]: PERF_RECORD_CPU_MAP nr: 1 cpu: 65535 0x12a [0x40]: PERF_RECORD_STAT_CONFIG 0x16a [0x30]: PERF_RECORD_STAT -1 -1 0x19a [0x40]: PERF_RECORD_MMAP -1/0: [0xffffffff81000000(0x1f000000) @ 0xffffffff81000000]: x [kernel.kallsyms]_text 0x1da [0x18]: PERF_RECORD_STAT_ROUND [acme@ssdandy linux]$ An effort was made to make perf.data files generated like this to not generate cryptic messages when processed by older tools. The 'perf script' bits need rebasing, will go up later. - Make command line options always available, even when they depend on some feature being enabled, warning the user about use of such options (Wang Nan) - Support hw breakpoint events (mem:0xAddress) in the default output mode in 'perf script' (Wang Nan) - Fixes and improvements for supporting annotating ARM binaries, support ARM call and jump instructions, more work needed to have arch specific stuff separated into tools/perf/arch/*/annotate/ (Russell King) - Add initial 'perf config' command, for now just with a --list command to the contents of the configuration file in use and a basic man page describing its format, commands for doing edits and detailed documentation are being reviewed and proof-read. (Taeung Song) - Allows BPF scriptlets specify arguments to be fetched using DWARF info, using a prologue generated at compile/build time (He Kuang, Wang Nan) - Allow attaching BPF scriptlets to module symbols (Wang Nan) - Allow attaching BPF scriptlets to userspace code using uprobe (Wang Nan) - BPF programs now can specify 'perf probe' tunables via its section name, separating key=val values using semicolons (Wang Nan) Testing some of these new BPF features: Use case: get callchains when receiving SSL packets, filter then in the kernel, at arbitrary place. # cat ssl.bpf.c #define SEC(NAME) __attribute__((section(NAME), used)) struct pt_regs; SEC("func=__inet_lookup_established hnum") int func(struct pt_regs *ctx, int err, unsigned short port) { return err == 0 && port == 443; } char _license[] SEC("license") = "GPL"; int _version SEC("version") = LINUX_VERSION_CODE; # # perf record -a -g -e ssl.bpf.c ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.787 MB perf.data (3 samples) ] # perf script | head -30 swapper 0 [000] 58783.268118: perf_bpf_probe:func: (ffffffff816a0f60) hnum=0x1bb 8a0f61 __inet_lookup_established (/lib/modules/4.3.0+/build/vmlinux) 896def ip_rcv_finish (/lib/modules/4.3.0+/build/vmlinux) 8976c2 ip_rcv (/lib/modules/4.3.0+/build/vmlinux) 855eba __netif_receive_skb_core (/lib/modules/4.3.0+/build/vmlinux) 8565d8 __netif_receive_skb (/lib/modules/4.3.0+/build/vmlinux) 8572a8 process_backlog (/lib/modules/4.3.0+/build/vmlinux) 856b11 net_rx_action (/lib/modules/4.3.0+/build/vmlinux) 2a284b __do_softirq (/lib/modules/4.3.0+/build/vmlinux) 2a2ba3 irq_exit (/lib/modules/4.3.0+/build/vmlinux) 96b7a4 do_IRQ (/lib/modules/4.3.0+/build/vmlinux) 969807 ret_from_intr (/lib/modules/4.3.0+/build/vmlinux) 2dede5 cpu_startup_entry (/lib/modules/4.3.0+/build/vmlinux) 95d5bc rest_init (/lib/modules/4.3.0+/build/vmlinux) 1163ffa start_kernel ([kernel.vmlinux].init.text) 11634d7 x86_64_start_reservations ([kernel.vmlinux].init.text) 1163623 x86_64_start_kernel ([kernel.vmlinux].init.text) qemu-system-x86 9178 [003] 58785.792417: perf_bpf_probe:func: (ffffffff816a0f60) hnum=0x1bb 8a0f61 __inet_lookup_established (/lib/modules/4.3.0+/build/vmlinux) 896def ip_rcv_finish (/lib/modules/4.3.0+/build/vmlinux) 8976c2 ip_rcv (/lib/modules/4.3.0+/build/vmlinux) 855eba __netif_receive_skb_core (/lib/modules/4.3.0+/build/vmlinux) 8565d8 __netif_receive_skb (/lib/modules/4.3.0+/build/vmlinux) 856660 netif_receive_skb_internal (/lib/modules/4.3.0+/build/vmlinux) 8566ec netif_receive_skb_sk (/lib/modules/4.3.0+/build/vmlinux) 430a br_handle_frame_finish ([bridge]) 48bc br_handle_frame ([bridge]) 855f44 __netif_receive_skb_core (/lib/modules/4.3.0+/build/vmlinux) 8565d8 __netif_receive_skb (/lib/modules/4.3.0+/build/vmlinux) # - Use 'perf probe' various options to list functions, see what variables can be collected at any given point, experiment first collecting without a filter, then filter, use it together with 'perf trace', 'perf top', with or without callchains, if it explodes, please tell us! - Introduce a new callchain mode: "folded", that will list per line representations of all callchains for a give histogram entry, facilitating 'perf report' output processing by other tools, such as Brendan Gregg's flamegraph tools (Namhyung Kim) E.g: # perf report | grep -v ^# | head 18.37% 0.00% swapper [kernel.kallsyms] [k] cpu_startup_entry | ---cpu_startup_entry | |--12.07%--start_secondary | --6.30%--rest_init start_kernel x86_64_start_reservations x86_64_start_kernel # Becomes, in "folded" mode: # perf report -g folded | grep -v ^# | head -5 18.37% 0.00% swapper [kernel.kallsyms] [k] cpu_startup_entry 12.07% cpu_startup_entry;start_secondary 6.30% cpu_startup_entry;rest_init;start_kernel;x86_64_start_reservations;x86_64_start_kernel 16.90% 0.00% swapper [kernel.kallsyms] [k] call_cpuidle 11.23% call_cpuidle;cpu_startup_entry;start_secondary 5.67% call_cpuidle;cpu_startup_entry;rest_init;start_kernel;x86_64_start_reservations;x86_64_start_kernel 16.90% 0.00% swapper [kernel.kallsyms] [k] cpuidle_enter 11.23% cpuidle_enter;call_cpuidle;cpu_startup_entry;start_secondary 5.67% cpuidle_enter;call_cpuidle;cpu_startup_entry;rest_init;start_kernel;x86_64_start_reservations;x86_64_start_kernel 15.12% 0.00% swapper [kernel.kallsyms] [k] cpuidle_enter_state # The user can also select one of "count", "period" or "percent" as the first column. ... and lots of infrastructure enhancements, plus fixes and other changes, features I failed to list - see the shortlog and the git log for details" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (271 commits) perf evlist: Add --trace-fields option to show trace fields perf record: Store data mmaps for dwarf unwind perf libdw: Check for mmaps also in MAP__VARIABLE tree perf unwind: Check for mmaps also in MAP__VARIABLE tree perf unwind: Use find_map function in access_dso_mem perf evlist: Remove perf_evlist__(enable|disable)_event functions perf evlist: Make perf_evlist__open() open evsels with their cpus and threads (like perf record does) perf report: Show random usage tip on the help line perf hists: Export a couple of hist functions perf diff: Use perf_hpp__register_sort_field interface perf tools: Add overhead/overhead_children keys defaults via string perf tools: Remove list entry from struct sort_entry perf tools: Include all tools/lib directory for tags/cscope/TAGS targets perf script: Align event name properly perf tools: Add missing headers in perf's MANIFEST perf tools: Do not show trace command if it's not compiled in perf report: Change default to use event group view perf top: Decay periods in callchains tools lib: Move bitmap.[ch] from tools/perf/ to tools/{lib,include}/ tools lib: Sync tools/lib/find_bit.c with the kernel ...	2016-01-11 14:39:17 -08:00
Denis Kirjanov	2701121b8f	tracing: Introduce TRACE_EVENT_FN_COND macro ... TRACE_EVENT_FN can't be used in some circumstances like invoking trace functions from offlined CPU due to RCU usage. This patch adds the TRACE_EVENT_FN_COND macro to make such trace points conditional. Link: http://lkml.kernel.org/r/1450124286-4822-1-git-send-email-kda@linux-powerpc.org Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2015-12-23 14:27:21 -05:00
Paul E. McKenney	7c9906ca5e	rcu: Don't redundantly disable irqs in rcu_irq_{enter,exit}() ... This commit replaces a local_irq_save()/local_irq_restore() pair with a lockdep assertion that interrupts are already disabled. This should remove the corresponding overhead from the interrupt entry/exit fastpaths. This change was inspired by the fact that Iftekhar Ahmed's mutation testing showed that removing rcu_irq_enter()'s call to local_ird_restore() had no effect, which might indicate that interrupts were always enabled anyway. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>	2015-12-07 17:01:31 -08:00
Andi Kleen	bd2a634d9e	tracepoints: Move struct tracepoint to new tracepoint-defs.h header ... Steven recommended open coding access to tracepoint->key to add trace points to headers. Unfortunately this is difficult for some headers (such as x86 asm/msr.h) because including tracepoint.h includes so many other headers that it causes include loops. The main problem is the include of linux/rcupdate.h, which pulls in a lot of other headers. The rcu header is only needed when actually defining trace points. Move the struct tracepoint into a separate tracepoint-defs.h header that can be included without pulling in all of RCU. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1449018060-1742-2-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>	2015-12-06 12:56:06 +01:00
Mathieu Desnoyers	a15920bea0	tracepoints: Fix documentation of RCU lockdep checks ... The documentation on top of __DECLARE_TRACE() does not match its implementation since the condition check has been added to the RCU lockdep checks. Update the documentation to match its implementation. Link: http://lkml.kernel.org/r/1446504164-21563-1-git-send-email-mathieu.desnoyers@efficios.com CC: Dave Hansen <dave@sr71.net> Fixes: a05d59a567 "tracing: Add condition check to RCU lockdep checks" Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2015-11-02 17:52:49 -05:00
Steven Rostedt (Red Hat)	7904b5c498	tracepoint: Give priority to probes of tracepoints ... In order to guarantee that a probe will be called before other probes that are attached to a tracepoint, there needs to be a mechanism to provide priority of one probe over the others. Adding a prio field to the struct tracepoint_func, which lets the probes be sorted by the priority set in the structure. If no priority is specified, then a priority of 10 is given (this is a macro, and perhaps may be changed in the future). Now probes may be added to affect other probes that are attached to a tracepoint with a guaranteed order. One use case would be to allow tracing of tracepoints be able to filter by pid. A special (higher priority probe) may be added to the sched_switch tracepoint and set the necessary flags of the other tracepoints to notify them if they should be traced or not. In case a tracepoint is enabled at the sched_switch tracepoint too, the order of the two are not random. Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2015-10-25 21:33:54 -04:00
Tal Shorer	c63b7682b6	tracing: Allow disabling compilation of specific trace systems ... Allow a trace events header file to disable compilation of its trace events by defining the preprocessor macro NOTRACE. This could be done, for example, according to a Kconfig option. Link: http://lkml.kernel.org/r/1438432079-11704-3-git-send-email-tal.shorer@gmail.com Signed-off-by: Tal Shorer <tal.shorer@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2015-10-20 21:55:44 -04:00
Steven Rostedt (Red Hat)	0c564a538a	tracing: Add TRACE_DEFINE_ENUM() macro to map enums to their values ... Several tracepoints use the helper functions __print_symbolic() or __print_flags() and pass in enums that do the mapping between the binary data stored and the value to print. This works well for reading the ASCII trace files, but when the data is read via userspace tools such as perf and trace-cmd, the conversion of the binary value to a human string format is lost if an enum is used, as userspace does not have access to what the ENUM is. For example, the tracepoint trace_tlb_flush() has: __print_symbolic(REC->reason, { TLB_FLUSH_ON_TASK_SWITCH, "flush on task switch" }, { TLB_REMOTE_SHOOTDOWN, "remote shootdown" }, { TLB_LOCAL_SHOOTDOWN, "local shootdown" }, { TLB_LOCAL_MM_SHOOTDOWN, "local mm shootdown" }) Which maps the enum values to the strings they represent. But perf and trace-cmd do no know what value TLB_LOCAL_MM_SHOOTDOWN is, and would not be able to map it. With TRACE_DEFINE_ENUM(), developers can place these in the event header files and ftrace will convert the enums to their values: By adding: TRACE_DEFINE_ENUM(TLB_FLUSH_ON_TASK_SWITCH); TRACE_DEFINE_ENUM(TLB_REMOTE_SHOOTDOWN); TRACE_DEFINE_ENUM(TLB_LOCAL_SHOOTDOWN); TRACE_DEFINE_ENUM(TLB_LOCAL_MM_SHOOTDOWN); $ cat /sys/kernel/debug/tracing/events/tlb/tlb_flush/format [...] __print_symbolic(REC->reason, { 0, "flush on task switch" }, { 1, "remote shootdown" }, { 2, "local shootdown" }, { 3, "local mm shootdown" }) The above is what userspace expects to see, and tools do not need to be modified to parse them. Link: http://lkml.kernel.org/r/20150403013802.220157513@goodmis.org Cc: Guilherme Cox <cox@computer.org> Cc: Tony Luck <tony.luck@gmail.com> Cc: Xie XiuQi <xiexiuqi@huawei.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2015-04-08 09:39:56 -04:00
Steven Rostedt (Red Hat)	a05d59a567	tracing: Add condition check to RCU lockdep checks ... The trace_tlb_flush() tracepoint can be called when a CPU is going offline. When a CPU is offline, RCU is no longer watching that CPU and since the tracepoint is protected by RCU, it must not be called. To prevent the tlb_flush tracepoint from being called when the CPU is offline, it was converted to a TRACE_EVENT_CONDITION where the condition checks if the CPU is online before calling the tracepoint. Unfortunately, this was not enough to stop lockdep from complaining about it. Even though the RCU protected code of the tracepoint will never be called, the condition is hidden within the tracepoint, and even though the condition prevents RCU code from being called, the lockdep checks are outside the tracepoint (this is to test tracepoints even when they are not enabled). Even though tracepoints should be checked to be RCU safe when they are not enabled, the condition should still be considered when checking RCU. Link: http://lkml.kernel.org/r/CA+icZUUGiGDoL5NU8RuxKzFjoLjEKRtUWx=JB8B9a0EQv-eGzQ@mail.gmail.com Fixes: 3a630178fd "tracing: generate RCU warnings even when tracepoints are disabled" Cc: stable@vger.kernel.org # 3.18+ Acked-by: Dave Hansen <dave@sr71.net> Reported-by: Sedat Dilek <sedat.dilek@gmail.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2015-02-07 19:34:25 -05:00
Dave Hansen	3a630178fd	tracing: generate RCU warnings even when tracepoints are disabled ... Dave Jones reported seeing a bug from one of my TLB tracepoints: http://lkml.kernel.org/r/20140806181801.GA4605@redhat.com I've been running these patches for months and never saw this. But, a big chunk of my testing, especially with all the debugging enabled, was in a vm where intel_idle doesn't work. On the systems where I was using intel_idle, I never had lockdep enabled and this tracepoint on at the same time. This patch ensures that whenever we have lockdep available, we do _some_ RCU activity at the site of the tracepoint, despite whether the tracepoint's condition matches or even if the tracepoint itself is completely disabled. This is a bit of a hack, but it is pretty self-contained. I confirmed that with this patch plus lockdep I get the same splat as Dave Jones did, but without enabling the tracepoint explicitly. Link: http://lkml.kernel.org/p/20140807175204.C257CAC5@viggo.jf.intel.com Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dave Hansen <dave@sr71.net> Cc: Dave Jones <davej@redhat.com>, Cc: paulmck@linux.vnet.ibm.com Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2014-09-10 10:48:46 -04:00
Steven Rostedt	3c49b52b15	tracing: Do not do anything special with tracepoint_string when tracing is disabled ... When CONFIG_TRACING is not enabled, there's no reason to save the trace strings either by the linker or as a static variable that can be referenced later. Simply pass back the string that is given to tracepoint_string(). Had to move the define to include/linux/tracepoint.h so that it is still visible when CONFIG_TRACING is not set. Link: http://lkml.kernel.org/p/1406318733-26754-2-git-send-email-nicolas.pitre@linaro.org Suggested-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2014-08-07 20:39:36 -04:00
Steven Rostedt (Red Hat)	7c65bbc7dc	tracing: Add trace_<tracepoint>_enabled() function ... There are some code paths in the kernel that need to do some preparations before it calls a tracepoint. As that code is worthless overhead when the tracepoint is not enabled, it would be prudent to have that code only run when the tracepoint is active. To accomplish this, all tracepoints now get a static inline function called "trace_<tracepoint-name>_enabled()" which returns true when the tracepoint is enabled and false otherwise. As an added bonus, that function uses the static_key of the tracepoint such that no branch is needed. if (trace_mytracepoint_enabled()) { arg = process_tp_arg(); trace_mytracepoint(arg); } Will keep the "process_tp_arg()" (which may be expensive to run) from being executed when the tracepoint isn't enabled. It's best to encapsulate the tracepoint itself in the if statement just to keep races. For example, if you had: if (trace_mytracepoint_enabled()) arg = process_tp_arg(); trace_mytracepoint(arg); There's a chance that the tracepoint could be enabled just after the if statement, and arg will be undefined when calling the tracepoint. Link: http://lkml.kernel.org/r/20140506094407.507b6435@gandalf.local.home Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2014-05-07 12:10:51 -04:00
Mathieu Desnoyers	b725dfea24	tracepoint: Fix sparse warnings in tracepoint.c ... Fix the following sparse warnings: CHECK kernel/tracepoint.c kernel/tracepoint.c:184:18: warning: incorrect type in assignment (different address spaces) kernel/tracepoint.c:184:18: expected struct tracepoint_func *tp_funcs kernel/tracepoint.c:184:18: got struct tracepoint_func [noderef] <asn:4>*funcs kernel/tracepoint.c:216:18: warning: incorrect type in assignment (different address spaces) kernel/tracepoint.c:216:18: expected struct tracepoint_func *tp_funcs kernel/tracepoint.c:216:18: got struct tracepoint_func [noderef] <asn:4>*funcs kernel/tracepoint.c:392:24: error: return expression in void function CC kernel/tracepoint.o kernel/tracepoint.c: In function tracepoint_module_going: kernel/tracepoint.c:491:6: warning: symbol 'syscall_regfunc' was not declared. Should it be static? kernel/tracepoint.c:508:6: warning: symbol 'syscall_unregfunc' was not declared. Should it be static? Link: http://lkml.kernel.org/r/1397049883-28692-1-git-send-email-mathieu.desnoyers@efficios.com Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2014-04-09 10:12:11 -04:00
Steven Rostedt (Red Hat)	eb7d035c59	tracepoint: Simplify tracepoint module search ... Instead of copying the num_tracepoints and tracepoints_ptrs from the module structure to the tp_mod structure, which only uses it to find the module associated to tracepoints of modules that are coming and going, simply copy the pointer to the module struct to the tracepoint tp_module structure. Also removed un-needed brackets around an if statement. Link: http://lkml.kernel.org/r/20140408201705.4dad2c4a@gandalf.local.home Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2014-04-08 20:45:34 -04:00
Mathieu Desnoyers	de7b297390	tracepoint: Use struct pointer instead of name hash for reg/unreg tracepoints ... Register/unregister tracepoint probes with struct tracepoint pointer rather than tracepoint name. This change, which vastly simplifies tracepoint.c, has been proposed by Steven Rostedt. It also removes 8.8kB (mostly of text) to the vmlinux size. From this point on, the tracers need to pass a struct tracepoint pointer to probe register/unregister. A probe can now only be connected to a tracepoint that exists. Moreover, tracers are responsible for unregistering the probe before the module containing its associated tracepoint is unloaded. text data bss dec hex filename 10443444 4282528 10391552 25117524 17f4354 vmlinux.orig 10434930 4282848 10391552 25109330 17f2352 vmlinux Link: http://lkml.kernel.org/r/1396992381-23785-2-git-send-email-mathieu.desnoyers@efficios.com CC: Ingo Molnar <mingo@kernel.org> CC: Frederic Weisbecker <fweisbec@gmail.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: Frank Ch. Eigler <fche@redhat.com> CC: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> [ SDR - fixed return val in void func in tracepoint_module_going() ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2014-04-08 20:43:28 -04:00
Linus Torvalds	68114e5eb8	Merge tag 'trace-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace ... Pull tracing updates from Steven Rostedt: "Most of the changes were largely clean ups, and some documentation. But there were a few features that were added: Uprobes now work with event triggers and multi buffers and have support under ftrace and perf. The big feature is that the function tracer can now be used within the multi buffer instances. That is, you can now trace some functions in one buffer, others in another buffer, all functions in a third buffer and so on. They are basically agnostic from each other. This only works for the function tracer and not for the function graph trace, although you can have the function graph tracer running in the top level buffer (or any tracer for that matter) and have different function tracing going on in the sub buffers" * tag 'trace-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (45 commits) tracing: Add BUG_ON when stack end location is over written tracepoint: Remove unused API functions Revert "tracing: Move event storage for array from macro to standalone function" ftrace: Constify ftrace_text_reserved tracepoints: API doc update to tracepoint_probe_register() return value tracepoints: API doc update to data argument ftrace: Fix compilation warning about control_ops_free ftrace/x86: BUG when ftrace recovery fails ftrace: Warn on error when modifying ftrace function ftrace: Remove freelist from struct dyn_ftrace ftrace: Do not pass data to ftrace_dyn_arch_init ftrace: Pass retval through return in ftrace_dyn_arch_init() ftrace: Inline the code from ftrace_dyn_table_alloc() ftrace: Cleanup of global variables ftrace_new_pgs and ftrace_update_cnt tracing: Evaluate len expression only once in __dynamic_array macro tracing: Correctly expand len expressions from __dynamic_array macro tracing/module: Replace include of tracepoint.h with jump_label.h in module.h tracing: Fix event header migrate.h to include tracepoint.h tracing: Fix event header writeback.h to include tracepoint.h tracing: Warn if a tracepoint is not set via debugfs ...	2014-04-03 10:26:31 -07:00
Mathieu Desnoyers	0dea6d5263	tracepoint: Remove unused API functions ... After the following commit: commit b75ef8b44b Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Date: Wed Aug 10 15:18:39 2011 -0400 Tracepoint: Dissociate from module mutex The following functions became unnecessary: - tracepoint_probe_register_noupdate, - tracepoint_probe_unregister_noupdate, - tracepoint_probe_update_all. In fact, none of the in-kernel tracers, nor LTTng, nor SystemTAP use them. Remove those. Moreover, the functions: - tracepoint_iter_start, - tracepoint_iter_next, - tracepoint_iter_stop, - tracepoint_iter_reset. are unused by in-kernel tracers, LTTng and SystemTAP. Remove those too. Link: http://lkml.kernel.org/r/1395379142-2118-2-git-send-email-mathieu.desnoyers@efficios.com Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2014-03-21 14:01:15 -04:00
Steven Rostedt (Red Hat)	45ab2813d4	tracing: Do not add event files for modules that fail tracepoints ... If a module fails to add its tracepoints due to module tainting, do not create the module event infrastructure in the debugfs directory. As the events will not work and worse yet, they will silently fail, making the user wonder why the events they enable do not display anything. Having a warning on module load and the events not visible to the users will make the cause of the problem much clearer. Link: http://lkml.kernel.org/r/20140227154923.265882695@goodmis.org Fixes: 6d723736e4 "tracing/events: add support for modules to TRACE_EVENT" Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: stable@vger.kernel.org # 2.6.31+ Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2014-03-03 21:11:05 -05:00
Jiri Kosina	e23c34bb41	Merge branch 'master' into for-next ... Sync with Linus' tree to be able to apply fixes on top of newer things in tree (efi-stub). Signed-off-by: Jiri Kosina <jkosina@suse.cz>	2013-12-19 15:08:32 +01:00
Viresh Kumar	2621bca83a	tracepoint: comment fix "binay" -> "binary" ... Binary was written as binay, probably by mistake. Fix it. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>	2013-12-02 15:47:36 +01:00
Peter Zijlstra	d5b5f391d4	ftrace, perf: Avoid infinite event generation loop ... Vince's perf-trinity fuzzer found yet another 'interesting' problem. When we sample the irq_work_exit tracepoint with period==1 (or PERF_SAMPLE_PERIOD) and we add an fasync SIGNAL handler we create an infinite event generation loop: ,-> <IPI> | irq_work_exit() -> | trace_irq_work_exit() -> | ... | __perf_event_overflow() -> (due to fasync) | irq_work_queue() -> (irq_work_list must be empty) '--------- arch_irq_work_raise() Similar things can happen due to regular poll() wakeups if we exceed the ring-buffer wakeup watermark, or have an event_limit. To avoid this, dis-allow sampling this particular tracepoint. In order to achieve this, create a special perf_perm function pointer for each event and call this (when set) on trying to create a tracepoint perf event. [ roasted: use expr... to allow for ',' in your expression ] Reported-by: Vince Weaver <vincent.weaver@maine.edu> Tested-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Dave Jones <davej@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/r/20131114152304.GC5364@laptop.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>	2013-11-19 16:57:40 +01:00
Steven Rostedt	f5abaa1bfc	tracing: Add DEFINE_EVENT_FN() macro ... Each TRACE_EVENT() adds several helper functions. If two or more trace events share the same structure and print format, they can also share most of these helper functions and save a lot of space from duplicate code. This is why the DECLARE_EVENT_CLASS() and DEFINE_EVENT() were created. Some events require a trigger to be called at registering and unregistering of the event and to do so they use TRACE_EVENT_FN(). If multiple events require a trigger, they currently have no choice but to use TRACE_EVENT_FN() as there's no DEFINE_EVENT_FN() available. This unfortunately causes a lot of wasted duplicate code created. By adding a DEFINE_EVENT_FN(), these events can still use a DECLARE_EVENT_CLASS() and then define their own triggers. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/51C3236C.8030508@hds.com Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>	2013-06-20 22:24:32 -07:00
Paul E. McKenney	d62840995a	trace: Allow idle-safe tracepoints to be called from irq ... __DECLARE_TRACE_RCU() currently creates an _rcuidle() tracepoint which may safely be invoked from what RCU considers to be an idle CPU. However, these _rcuidle() tracepoints may -not- be invoked from the handler of an irq taken from idle, because rcu_idle_enter() zeroes RCU's nesting-level counter, so that the rcu_irq_exit() returning to idle will trigger a WARN_ON_ONCE(). This commit therefore substitutes rcu_irq_enter() for rcu_idle_exit() and rcu_irq_exit() for rcu_idle_enter() in order to make the _rcuidle() tracepoints usable from irq handlers as well as from process context. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org>	2013-06-10 13:37:10 -07:00
Josh Triplett	7ece55a4a3	trace: Don't declare trace_*_rcuidle functions in modules ... Tracepoints declare a static inline trace_*_rcuidle variant of the trace function, to support safely generating trace events from the idle loop. Module code never actually uses that variant of trace functions, because modules don't run code that needs tracing with RCU idled. However, the declaration of those otherwise unused functions causes the module to reference rcu_idle_exit and rcu_idle_enter, which RCU does not export to modules. To avoid this, don't generate trace_*_rcuidle functions for tracepoints declared in module code. Link: http://lkml.kernel.org/r/20120905062306.GA14756@leaf Reported-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2012-09-12 10:20:14 -04:00
Jason Baron	326f418b4c	tracepoint: Use static_key_false(), since static_branch() is deprecated ... Convert the last user of static_branch() -> static_key_false(). Signed-off-by: Jason Baron <jbaron@redhat.com> Cc: rostedt@goodmis.org Cc: mathieu.desnoyers@efficios.com Cc: a.p.zijlstra@chello.nl Link: http://lkml.kernel.org/r/5fffcd40a6c063769badcdd74a7d90980500dbcb.1340909155.git.jbaron@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>	2012-07-06 10:53:49 +02:00
Ingo Molnar	c5905afb0e	static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]() ... So here's a boot tested patch on top of Jason's series that does all the cleanups I talked about and turns jump labels into a more intuitive to use facility. It should also address the various misconceptions and confusions that surround jump labels. Typical usage scenarios: #include <linux/static_key.h> struct static_key key = STATIC_KEY_INIT_TRUE; if (static_key_false(&key)) do unlikely code else do likely code Or: if (static_key_true(&key)) do likely code else do unlikely code The static key is modified via: static_key_slow_inc(&key); ... static_key_slow_dec(&key); The 'slow' prefix makes it abundantly clear that this is an expensive operation. I've updated all in-kernel code to use this everywhere. Note that I (intentionally) have not pushed through the rename blindly through to the lowest levels: the actual jump-label patching arch facility should be named like that, so we want to decouple jump labels from the static-key facility a bit. On non-jump-label enabled architectures static keys default to likely()/unlikely() branches. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Jason Baron <jbaron@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: a.p.zijlstra@chello.nl Cc: mathieu.desnoyers@efficios.com Cc: davem@davemloft.net Cc: ddaney.cavm@gmail.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/20120222085809.GA26397@elte.hu Signed-off-by: Ingo Molnar <mingo@elte.hu>	2012-02-24 10:05:59 +01:00
Steven Rostedt	2fbb90db1b	tracing/rcu: Add trace_##name##__rcuidle() static tracepoint for inside rcu_idle_exit() sections ... Added is a new static inline function that lets *any* tracepoint be used inside a rcu_idle_exit() section. And this also solves the problem where the same tracepoint may be used inside a rcu_idle_exit() section as well as outside of one. I added a new tracepoint function with a "_rcuidle" extension. All tracepoints can be used with either the normal "trace_foobar()" function, or the "trace_foobar_rcuidle()" function when inside a rcu_idle_exit() section. All tracepoints defined by TRACE_EVENT() or any of the derivatives will have a "_rcuidle()" function also defined. When a tracepoint is used within an rcu_idle_exit() section, the "_rcuidle()" version must be used. This denotes that the tracepoint is within rcu_idle_exit() and it allows the rcu read locks within the tracepoint to still be valid, as this version takes us out of rcu_idle_exit(). Another nice aspect about this patch is that "static inline"s are not compiled into text when not used. So only the tracepoints that actually use the _rcuidle() version will have them defined in the actual text that is booted. Link: http://lkml.kernel.org/r/1328563113.2200.39.camel@gandalf.stny.rr.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2012-02-13 08:23:21 -05:00
Mathieu Desnoyers	b75ef8b44b	Tracepoint: Dissociate from module mutex ... Copy the information needed from struct module into a local module list held within tracepoint.c from within the module coming/going notifier. This vastly simplifies locking of tracepoint registration / unregistration, because we don't have to take the module mutex to register and unregister tracepoints anymore. Steven Rostedt ran into dependency problems related to modules mutex vs kprobes mutex vs ftrace mutex vs tracepoint mutex that seems to be hard to fix without removing this dependency between tracepoint and module mutex. (note: it should be investigated whether kprobes could benefit of being dissociated from the modules mutex too.) This also fixes module handling of tracepoint list iterators, because it was expecting the list to be sorted by pointer address. Given we have control on our own list now, it's OK to sort this list which has tracepoints as its only purpose. The reason why this sorting is required is to handle the fact that seq files (and any read() operation from user-space) cannot hold the tracepoint mutex across multiple calls, so list entries may vanish between calls. With sorting, the tracepoint iterator becomes usable even if the list don't contain the exact item pointed to by the iterator anymore. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: Jason Baron <jbaron@redhat.com> CC: Ingo Molnar <mingo@elte.hu> CC: Lai Jiangshan <laijs@cn.fujitsu.com> CC: Peter Zijlstra <a.p.zijlstra@chello.nl> CC: Thomas Gleixner <tglx@linutronix.de> CC: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/r/20110810191839.GC8525@Krystal Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2011-08-10 20:38:14 -04:00
Jason Baron	d430d3d7e6	jump label: Introduce static_branch() interface ... Introduce: static __always_inline bool static_branch(struct jump_label_key *key); instead of the old JUMP_LABEL(key, label) macro. In this way, jump labels become really easy to use: Define: struct jump_label_key jump_key; Can be used as: if (static_branch(&jump_key)) do unlikely code enable/disale via: jump_label_inc(&jump_key); jump_label_dec(&jump_key); that's it! For the jump labels disabled case, the static_branch() becomes an atomic_read(), and jump_label_inc()/dec() are simply atomic_inc(), atomic_dec() operations. We show testing results for this change below. Thanks to H. Peter Anvin for suggesting the 'static_branch()' construct. Since we now require a 'struct jump_label_key *key', we can store a pointer into the jump table addresses. In this way, we can enable/disable jump labels, in basically constant time. This change allows us to completely remove the previous hashtable scheme. Thanks to Peter Zijlstra for this re-write. Testing: I ran a series of 'tbench 20' runs 5 times (with reboots) for 3 configurations, where tracepoints were disabled. jump label configured in avg: 815.6 jump label *not* configured in (using atomic reads) avg: 800.1 jump label *not* configured in (regular reads) avg: 803.4 Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20110316212947.GA8792@redhat.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Suggested-by: H. Peter Anvin <hpa@linux.intel.com> Tested-by: David Daney <ddaney@caviumnetworks.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2011-04-04 12:48:08 -04:00
Mathieu Desnoyers	6549864629	tracepoints: Fix section alignment using pointer array ... Make the tracepoints more robust, making them solid enough to handle compiler changes by not relying on anything based on compiler-specific behavior with respect to structure alignment. Implement an approach proposed by David Miller: use an array of const pointers to refer to the individual structures, and export this pointer array through the linker script rather than the structures per se. It will consume 32 extra bytes per tracepoint (24 for structure padding and 8 for the pointers), but are less likely to break due to compiler changes. History: commit 7e066fb8 tracepoints: add DECLARE_TRACE() and DEFINE_TRACE() added the aligned(32) type and variable attribute to the tracepoint structures to deal with gcc happily aligning statically defined structures on 32-byte multiples. One attempt was to use a 8-byte alignment for tracepoint structures by applying both the variable and type attribute to tracepoint structures definitions and declarations. It worked fine with gcc 4.5.1, but broke with gcc 4.4.4 and 4.4.5. The reason is that the "aligned" attribute only specify the _minimum_ alignment for a structure, leaving both the compiler and the linker free to align on larger multiples. Because tracepoint.c expects the structures to be placed as an array within each section, up-alignment cause NULL-pointer exceptions due to the extra unexpected padding. (this patch applies on top of -tip) Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: David S. Miller <davem@davemloft.net> LKML-Reference: <20110126222622.GA10794@Krystal> CC: Frederic Weisbecker <fweisbec@gmail.com> CC: Ingo Molnar <mingo@elte.hu> CC: Thomas Gleixner <tglx@linutronix.de> CC: Andrew Morton <akpm@linux-foundation.org> CC: Peter Zijlstra <peterz@infradead.org> CC: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2011-02-03 09:28:46 -05:00
Lai Jiangshan	bd1c8b22b7	tracepoint: Add __rcu annotation ... Add __rcu annotation to : (struct tracepoint)->funcs Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <4D22D4F1.50505@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2011-01-07 20:57:22 -05:00
Mathieu Desnoyers	ec6e7c3ae3	tracing/trivial: Add missing comma in TRACE_EVENT comment ... Add missing comma within the TRACE_EVENT() example in tracepoint.h. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20110106184532.GA2526@Krystal> CC: Frederic Weisbecker <fweisbec@gmail.com> CC: Ingo Molnar <mingo@elte.hu> CC: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>	2011-01-07 20:53:35 -05:00