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1e9d90dbed120ec98517428ffff4dacd9797e39d
android_kernel_xiaomi_sm8450/arch/sparc/kernel
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Nicolin Chen 1e9d90dbed dma-mapping: introduce dma_get_seg_boundary_nr_pages() 
We found that callers of dma_get_seg_boundary mostly do an ALIGN
with page mask and then do a page shift to get number of pages:
    ALIGN(boundary + 1, 1 << shift) >> shift

However, the boundary might be as large as ULONG_MAX, which means
that a device has no specific boundary limit. So either "+ 1" or
passing it to ALIGN() would potentially overflow.

According to kernel defines:
    #define ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
    #define ALIGN(x, a)	ALIGN_MASK(x, (typeof(x))(a) - 1)

We can simplify the logic here into a helper function doing:
  ALIGN(boundary + 1, 1 << shift) >> shift
= ALIGN_MASK(b + 1, (1 << s) - 1) >> s
= {[b + 1 + (1 << s) - 1] & ~[(1 << s) - 1]} >> s
= [b + 1 + (1 << s) - 1] >> s
= [b + (1 << s)] >> s
= (b >> s) + 1

This patch introduces and applies dma_get_seg_boundary_nr_pages()
as an overflow-free helper for the dma_get_seg_boundary() callers
to get numbers of pages. It also takes care of the NULL dev case
for non-DMA API callers.

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Acked-by: Niklas Schnelle <schnelle@linux.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-09-03 18:12:15 +02:00
..
syscalls
all arch: remove system call sys_sysctl
2020-08-14 19:56:56 -07:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
adi_64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482
2019-06-19 17:09:52 +02:00
apc.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
asm-offsets.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
audit.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
auxio_32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
auxio_64.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
btext.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
central.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
cherrs.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
chmc.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
compat_audit.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cpu.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
cpumap.c
sparc64: Replace zero-length array with flexible-array
2020-05-07 18:49:04 -07:00
cpumap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
devices.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ds.c
sparc64: Replace zero-length array with flexible-array
2020-05-07 18:49:04 -07:00
dtlb_miss.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dtlb_prot.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ebus.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
entry.h
sparc64: Add support for ADI register fields, ASIs and traps
2018-03-18 07:38:45 -07:00
entry.S
sparc: share process creation helpers between sparc and sparc64
2020-06-23 10:49:56 +02:00
etrap_32.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
etrap_64.S
sparc64: Add support for ADI (Application Data Integrity)
2018-03-18 07:38:48 -07:00
fpu_traps.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ftrace.c
sparc/function_graph: Simplify with function_graph_enter()
2018-11-27 20:31:46 -05:00
getsetcc.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
head_32.S
sparc32: mm: Restructure sparc32 MMU page-table layout
2020-05-13 15:32:00 -07:00
head_64.S
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
helpers.S
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
hvapi.c
sparc64: Oracle DAX infrastructure
2018-01-22 08:17:15 -08:00
hvcalls.S
sparc64: Oracle DAX infrastructure
2018-01-22 08:17:15 -08:00
hvtramp.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
idprom.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
iommu_common.h
sparc: remove the mapping_error dma_map_ops method
2018-12-06 06:56:40 -08:00
iommu-common.c
dma-mapping: introduce dma_get_seg_boundary_nr_pages()
2020-09-03 18:12:15 +02:00
iommu.c
dma-mapping: introduce dma_get_seg_boundary_nr_pages()
2020-09-03 18:12:15 +02:00
ioport.c
sparc32: use per-device dma_ops
2020-04-02 18:11:55 -07:00
irq_32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq_64.c
sparc: Use of_node_name_eq for node name comparisons
2018-11-18 13:35:21 -08:00
irq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
itlb_miss.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ivec.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
jump_label.c
jump_label: move 'asm goto' support test to Kconfig
2019-01-06 09:46:51 +09:00
kernel.h
sparc: share process creation helpers between sparc and sparc64
2020-06-23 10:49:56 +02:00
kgdb_32.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
kgdb_64.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
kprobes.c
bpf/error-inject/kprobes: Clear current_kprobe and enable preempt in kprobe
2018-06-21 12:33:19 +02:00
kstack.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ktlb.S
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
ldc.c
iommu-common: move to arch/sparc
2018-05-09 06:54:27 +02:00
led.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
leon_kernel.c
sparc: Remove unused leon_trans_init
2018-11-18 13:35:22 -08:00
leon_pci_grpci1.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
leon_pci_grpci2.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
leon_pci.c
sparc/PCI: Use dev_printk() when possible
2018-05-22 07:54:06 -05:00
leon_pmc.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
leon_smp.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
Makefile
sparc: share process creation helpers between sparc and sparc64
2020-06-23 10:49:56 +02:00
mdesc.c
mdesc: fix a missing-check bug in get_vdev_port_node_info()
2019-06-02 22:15:35 -07:00
misctrap.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
module.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nmi.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
of_device_32.c
sparc: Use DT node full_name instead of name for resources
2018-11-18 13:35:22 -08:00
of_device_64.c
sparc: Use DT node full_name instead of name for resources
2018-11-18 13:35:22 -08:00
of_device_common.c
sparc32: use per-device dma_ops
2020-04-02 18:11:55 -07:00
of_device_common.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pci_common.c
sparc/PCI: Use dev_printk() when possible
2018-05-22 07:54:06 -05:00
pci_fire.c
mm: replace all open encodings for NUMA_NO_NODE
2019-03-05 21:07:14 -08:00
pci_impl.h
sparc/PCI: Support arbitrary host bridge address offset
2018-02-15 15:07:30 -06:00
pci_msi.c
sparc/PCI: Use dev_printk() when possible
2018-05-22 07:54:06 -05:00
pci_psycho.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pci_sabre.c
sparc: Use of_node_name_eq for node name comparisons
2018-11-18 13:35:21 -08:00
pci_schizo.c
mm: replace all open encodings for NUMA_NO_NODE
2019-03-05 21:07:14 -08:00
pci_sun4v_asm.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pci_sun4v.c
dma-mapping: introduce dma_get_seg_boundary_nr_pages()
2020-09-03 18:12:15 +02:00
pci_sun4v.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pci.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
pcic.c
sparc/PCI: Use dev_printk() when possible
2018-05-22 07:54:06 -05:00
pcr.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
perf_event.c
sparc: perf: fix updated event period in response to PERF_EVENT_IOC_PERIOD
2019-06-02 22:16:33 -07:00
pmc.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
power.c
sparc: Convert to using %pOFn instead of device_node.name
2018-11-18 13:35:20 -08:00
process_32.c
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-08-09 13:33:54 -07:00
process_64.c
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-08-09 13:33:54 -07:00
process.c
arch: rename copy_thread_tls() back to copy_thread()
2020-07-04 23:41:37 +02:00
prom_32.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
prom_64.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
prom_common.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
prom_irqtrans.c
sparc: Use device_type helpers to access the node type
2018-11-18 13:35:21 -08:00
prom.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
psycho_common.c
mm: replace all open encodings for NUMA_NO_NODE
2019-03-05 21:07:14 -08:00
psycho_common.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ptrace_32.c
sparc: switch to ->regset_get()
2020-07-27 14:31:08 -04:00
ptrace_64.c
sparc: switch to ->regset_get()
2020-07-27 14:31:08 -04:00
reboot.c
sparc: Use device_type helpers to access the node type
2018-11-18 13:35:21 -08:00
rtrap_32.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
rtrap_64.S
sched/rt, sparc: Use CONFIG_PREEMPTION
2019-12-08 14:37:35 +01:00
sbus.c
mm: replace all open encodings for NUMA_NO_NODE
2019-03-05 21:07:14 -08:00
setup_32.c
initrd: remove support for multiple floppies
2020-07-30 08:22:33 +02:00
setup_64.c
initrd: remove support for multiple floppies
2020-07-30 08:22:33 +02:00
signal32.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
signal_32.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
signal_64.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
sigutil_32.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
sigutil_64.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sigutil.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
smp_32.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
smp_64.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
sparc_ksyms.c
sparc: move exports to definitions
2016-08-07 23:55:43 -04:00
spiterrs.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sstate.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
stacktrace.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
starfire.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sun4d_irq.c
sparc: Use of_node_name_eq for node name comparisons
2018-11-18 13:35:21 -08:00
sun4d_smp.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sun4m_irq.c
mm: remove unneeded includes of <asm/pgalloc.h>
2020-08-07 11:33:26 -07:00
sun4m_smp.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sun4v_ivec.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sun4v_mcd.S
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482
2019-06-19 17:09:52 +02:00
sun4v_tlb_miss.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sys32.S
net: remove compat_sys_{get,set}sockopt
2020-07-19 18:16:40 -07:00
sys_sparc32.c
sparc: remove unused header file nfs_fs.h
2020-06-02 18:41:48 -07:00
sys_sparc_32.c
signal: Remove the task parameter from force_sig_fault
2019-05-29 09:31:43 -05:00
sys_sparc_64.c
sparc64: fix adjtimex regression
2020-02-02 11:54:41 +01:00
syscalls.S
sparc64: enable HAVE_COPY_THREAD_TLS
2020-06-23 10:49:54 +02:00
sysfs.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
systbls_32.S
sparc: generate uapi header and system call table files
2018-11-18 18:52:22 -08:00
systbls_64.S
sparc: generate uapi header and system call table files
2018-11-18 18:52:22 -08:00
systbls.h
sparc: get rid of asm wrapper for nis_syscall()
2018-03-20 12:05:17 -04:00
time_32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
time_64.c
cpufreq: Call transition notifier only once for each policy
2019-05-10 12:20:36 +02:00
trampoline_32.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trampoline_64.S
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
traps_32.c
mm: reorder includes after introduction of linux/pgtable.h
2020-06-09 09:39:13 -07:00
traps_64.c
mm: don't include asm/pgtable.h if linux/mm.h is already included
2020-06-09 09:39:13 -07:00
tsb.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ttable_32.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ttable_64.S
sparc64: Add support for ADI register fields, ASIs and traps
2018-03-18 07:38:45 -07:00
una_asm_32.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
una_asm_64.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
unaligned_32.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
unaligned_64.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
uprobes.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
urtt_fill.S
sparc64: Add support for ADI (Application Data Integrity)
2018-03-18 07:38:48 -07:00
utrap.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vdso.c
locking/seqlock, headers: Untangle the spaghetti monster
2020-08-06 16:13:13 +02:00
vio.c
sparc: use scnprintf() in show_pciobppath_attr() in vio.c
2020-05-13 15:35:58 -07:00
viohs.c
sparc64: viohs: Remove VLA usage
2018-10-07 22:42:00 -07:00
visemul.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vmlinux.lds.S
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
2020-01-30 07:36:43 -08:00
windows.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
winfixup.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
wof.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
wuf.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00