Linus Torvalds ea34f43a07 acpi-cpufreq: fix 'smp_call_function_many()' confusion ...

It turns out that 'smp_call_function_many()' doesn't work at all like
'smp_call_function_single()', and my change to Andrew's patch to use it
rather than a loop over all CPU's acpi-cpufreq doesn't work.

My bad.

'smp_call_function_many()' has two "features" (aka "documented bugs"):

 (a) it needs to be called with preemption disabled, because it uses
     smp_processor_id() without guarding the CPU lookup with 'get_cpu()'
     and 'put_cpu()' like the 'single' variant does.

 (b) even if the current CPU is part of the CPU mask, it won't do the
     call on that CPU.

Still, we're better off trying to use 'smp_call_function_many()' than
looping over CPU's, since it at least in theory allows us to use a
broadcast IPI and do it all in parallel.  So let's just work around the
silly semantic bugs in that function.

Reported-and-tested-by: Ali Gholami Rudi <ali@rudi.ir>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-04-15 08:41:16 -07:00

..

acpi

Merge branch 'linus' into release

2009-04-05 02:14:15 -04:00

apic

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-13 11:32:09 -07:00

cpu

acpi-cpufreq: fix 'smp_call_function_many()' confusion

2009-04-15 08:41:16 -07:00

.gitignore

…

alternative.c

x86: expand irq-off region in text_poke()

2009-03-10 16:24:23 +01:00

amd_iommu_init.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu

2009-01-03 12:03:52 -08:00

amd_iommu.c

Merge git://git.infradead.org/iommu-2.6

2009-04-03 10:36:57 -07:00

aperture_64.c

aperture_64.c: clarify that too small aperture is valid reason for this code

2008-11-28 15:24:39 +01:00

apm_32.c

Merge branch 'cpumask-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-03-31 13:33:50 +10:30

asm-offsets_32.c

pm: rework includes, remove arch ifdefs

2009-04-01 08:59:16 -07:00

asm-offsets_64.c

pm: rework includes, remove arch ifdefs

2009-04-01 08:59:16 -07:00

asm-offsets.c

…

audit_64.c

…

bios_uv.c

x86: bios_uv.c: uv_systab should be static

2008-12-29 22:08:28 -08:00

bootflag.c

…

check.c

x86: fix 64k corruption-check

2009-03-15 07:03:15 +01:00

cpuid.c

Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-01-03 12:04:39 -08:00

crash_dump_32.c

kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE

2008-10-20 08:52:39 -07:00

crash_dump_64.c

kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE

2008-10-20 08:52:39 -07:00

crash.c

x86, apic: remove duplicate asm/apic.h inclusions

2009-02-17 17:52:44 +01:00

doublefault_32.c

x86: fix virt_addr_valid() with CONFIG_DEBUG_VIRTUAL=y, v2

2008-10-13 10:33:15 +02:00

ds.c

x86, pebs: correct qualifier passed to ds_write_config() from ds_request_pebs()

2009-03-06 16:13:15 +01:00

dumpstack_32.c

ftrace: print real return in dumpstack for function graph

2008-12-03 08:56:25 +01:00

dumpstack_64.c

x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit.

2009-01-19 00:38:58 +09:00

dumpstack.c

Merge commit 'origin/master' into next

2009-03-30 14:04:53 +11:00

dumpstack.h

ftrace: print real return in dumpstack for function graph

2008-12-03 08:56:25 +01:00

e820.c

x86: e820 fix various signedness issues in setup.c and e820.c

2009-03-23 15:02:05 +05:30

early_printk.c

x86: properly __init-annotate recent early_printk additions

2009-03-13 02:37:18 +01:00

early-quirks.c

x86: only scan the root bus in early PCI quirks

2009-01-09 12:46:22 -08:00

efi_32.c

x86: fix i486 suspend to disk CR4 oops

2008-08-18 08:50:19 +02:00

efi_64.c

Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

2009-03-27 17:28:43 +01:00

efi_stub_32.S

Merge branch 'x86/asm' into x86/mm

2009-02-25 08:27:46 +01:00

efi_stub_64.S

x86: efi_stub_32,64 - add missing ENDPROCs

2009-02-24 18:08:40 +01:00

efi.c

Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

2009-03-27 17:28:43 +01:00

entry_32.S

x86: entry_32.S fix compile warnings - fix work mask bit width

2009-03-14 09:42:51 +01:00

entry_64.S

x86-64: move save_paranoid into .kprobes.text

2009-03-12 11:57:46 +01:00

ftrace.c

tracing/syscalls: use a dedicated file header

2009-04-09 05:43:32 +02:00

geode_32.c

…

head32.c

x86-32: use brk segment for allocating initial kernel pagetable

2009-03-14 17:23:47 -07:00

head64.c

x86: add brk allocation for very, very early allocations

2009-03-14 15:37:14 -07:00

head_32.S

x86-32: tighten the bound on additional memory to map

2009-03-17 11:52:10 -07:00

head_64.S

x86: head_64.S - use IDT_ENTRIES instead of hardcoded number

2009-02-24 18:08:38 +01:00

head.c

x86, debug: remove EBDA debug printk

2008-12-12 11:08:42 +01:00

hpet.c

x86: hpet: stop HPET_COUNTER when programming periodic mode

2009-02-22 18:01:18 +01:00

i386_ksyms_32.c

ftrace: rename FTRACE to FUNCTION_TRACER

2008-10-20 18:27:03 +02:00

i387.c

x86, math-emu: fix init_fpu for task != current

2009-03-04 20:33:16 +01:00

i8237.c

i8327: fix outb() parameter order

2009-02-10 13:13:23 +01:00

i8253.c

x86: i8253 cleanup

2009-03-21 16:56:10 +05:30

i8259.c

x86: refactor x86_quirks support

2009-02-23 00:08:11 +01:00

init_task.c

take init_fs to saner place

2008-12-31 18:07:42 -05:00

io_delay.c

x86: io_delay.c cleanup

2009-03-21 16:57:04 +05:30

ioport.c

x86-32: use non-lazy io bitmap context switching

2009-03-02 12:07:48 +01:00

irq_32.c

Merge branch 'tj-percpu' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into core/percpu

2009-02-24 21:52:45 +01:00

irq_64.c

x86: unify do_IRQ()

2009-02-09 12:16:05 +01:00

irq.c

x86: smarten /proc/interrupts output for new counters

2009-04-08 18:06:07 +02:00

irqinit_32.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask

2009-03-30 18:00:26 -07:00

irqinit_64.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask

2009-03-30 18:00:26 -07:00

k8.c

x86, gart: fix gart detection for Fam11h CPUs

2008-10-28 17:10:27 +01:00

kdebugfs.c

x86: kdebugfs.c cleanup

2009-03-21 16:55:45 +05:30

kgdb.c

x86, apic: remove genapic.h

2009-02-17 17:52:44 +01:00

kprobes.c

Merge branch 'tracing/core-v2' into tracing-for-linus

2009-04-02 00:49:02 +02:00

kvm.c

x86: with the last user gone, remove set_pte_present

2009-03-19 14:04:19 +01:00

kvmclock.c

x86: refactor x86_quirks support

2009-02-23 00:08:11 +01:00

ldt.c

x86: ldt.c fix style problems

2009-01-02 17:46:24 +01:00

machine_kexec_32.c

x86, kexec: fix kexec x86 coding style

2009-03-10 18:13:25 -07:00

machine_kexec_64.c

x86, kexec: x86_64: add kexec jump support for x86_64

2009-03-10 18:13:25 -07:00

Makefile

Merge branch 'tracing/core-v2' into tracing-for-linus

2009-04-02 00:49:02 +02:00

mca_32.c

x86: refactor x86_quirks support

2009-02-23 00:08:11 +01:00

mfgpt_32.c

cpumask: remove references to struct irqaction's mask field.

2009-03-30 22:05:14 +10:30

microcode_amd.c

x86: microcode: cleanup

2009-03-18 13:51:17 +01:00

microcode_core.c

x86 microcode: revert some work_on_cpu

2009-04-14 11:45:59 -07:00

microcode_intel.c

x86: microcode: cleanup

2009-03-18 13:51:17 +01:00

mmconf-fam10h_64.c

x86: move various CPU initialization objects into .cpuinit.rodata

2009-03-12 13:13:07 +01:00

module_32.c

x86: module_32.c fix style problems

2009-01-12 11:22:55 +01:00

module_64.c

x86: module_64.c fix style problems

2009-01-12 11:23:01 +01:00

mpparse.c

x86: Fix section mismatches in mpparse

2009-04-12 12:32:18 +02:00

msr.c

x86: msr.c fix style problems

2009-01-12 11:22:50 +01:00

olpc.c

x86, olpc: fix model detection without OFW

2009-02-14 23:05:25 +01:00

paravirt_patch_32.c

x86/pvops: add a paravirt_ident functions to allow special patching

2009-01-30 14:51:44 -08:00

paravirt_patch_64.c

x86/pvops: add a paravirt_ident functions to allow special patching

2009-01-30 14:51:44 -08:00

paravirt-spinlocks.c

x86: remove byte locks

2009-01-20 17:14:28 +01:00

paravirt.c

x86: with the last user gone, remove set_pte_present

2009-03-19 14:04:19 +01:00

pci-calgary_64.c

x86, ia64: convert to use generic dma_map_ops struct

2009-01-06 14:06:57 +01:00

pci-dma.c

dma-mapping: replace all DMA_24BIT_MASK macro with DMA_BIT_MASK(24)

2009-04-07 08:31:12 -07:00

pci-gart_64.c

Merge branch 'linus' into core/iommu

2009-03-05 12:47:28 +01:00

pci-nommu.c

dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)

2009-04-07 08:31:11 -07:00

pci-swiotlb.c

x86: rename arch/x86/kernel/pci-swiotlb_64.c => pci-swiotlb.c

2009-01-23 12:06:44 +01:00

pcspeaker.c

x86: use platform_device_register_simple()

2008-09-22 12:58:36 +02:00

pmtimer_64.c

…

probe_roms_32.c

x86: move mach-default/*.h files to asm/

2009-01-29 14:16:51 +01:00

process_32.c

Simplify copy_thread()

2009-04-02 19:04:51 -07:00

process_64.c

Simplify copy_thread()

2009-04-02 19:04:51 -07:00

process.c

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05 11:04:19 -07:00

ptrace.c

tracing/syscalls: use a dedicated file header

2009-04-09 05:43:32 +02:00

pvclock.c

x86: pvclock: fix shadowed variable warning

2008-10-15 14:25:14 +02:00

quirks.c

Merge branch 'linus' into x86/core

2009-03-28 22:27:45 +01:00

reboot_fixups_32.c

…

reboot.c

x86: DMI match for the Dell DXP061 as it needs BIOS reboot

2009-04-08 17:53:27 +02:00

relocate_kernel_32.S

x86, kexec: fix kexec x86 coding style

2009-03-10 18:13:25 -07:00

relocate_kernel_64.S

x86, kexec: x86_64: add kexec jump support for x86_64

2009-03-10 18:13:25 -07:00

rtc.c

x86: rtc.c cleanup

2009-03-21 16:56:37 +05:30

scx200_32.c

…

setup_percpu.c

x86: remove duplicated code with pcpu_need_numa()

2009-04-02 06:08:05 +02:00

setup.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask

2009-03-30 18:00:26 -07:00

signal.c

x86: signal: check sas_ss_size instead of sas_ss_flags()

2009-04-01 17:13:17 +02:00

smp.c

x86, apic: remove genapic.h

2009-02-17 17:52:44 +01:00

smpboot.c

cpumask: use new cpumask functions throughout x86

2009-03-13 14:49:54 +10:30

stacktrace.c

x86: update copyrights

2009-01-31 04:21:18 +01:00

step.c

…

sys_i386_32.c

x86: Introducing asm/syscalls.h

2008-07-22 14:35:57 +02:00

sys_x86_64.c

Merge branches 'x86/alternatives', 'x86/cleanups', 'x86/commandline', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/doc', 'x86/exports', 'x86/fpu', 'x86/gart', 'x86/idle', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/oprofile', 'x86/paravirt', 'x86/reboot', 'x86/sparse-fixes', 'x86/tsc', 'x86/urgent' and 'x86/vmalloc' into x86-v28-for-linus-phase1

2008-10-06 18:17:07 +02:00

syscall_64.c

x86: Fix ASM_X86__ header guards

2008-10-22 22:55:23 -07:00

syscall_table_32.S

preadv/pwritev: Add preadv and pwritev system calls.

2009-04-02 19:05:08 -07:00

tce_64.c

…

test_nx.c

…

test_rodata.c

…

time_32.c

x86: refactor x86_quirks support

2009-02-23 00:08:11 +01:00

time_64.c

cpumask: remove references to struct irqaction's mask field.

2009-03-30 22:05:14 +10:30

tlb_uv.c

Merge branch 'linus' into cpumask-for-linus

2009-03-30 23:53:32 +02:00

tls.c

x86: Introducing asm/syscalls.h

2008-07-22 14:35:57 +02:00

tls.h

…

topology.c

x86: topology.c cleanup

2009-03-21 16:55:24 +05:30

trampoline_32.S

x86: use _types.h headers in asm where available

2009-02-13 11:35:01 -08:00

trampoline_64.S

x86: use _types.h headers in asm where available

2009-02-13 11:35:01 -08:00

trampoline.c

x86: change static allocation of trampoline area

2008-12-08 13:49:45 +01:00

traps.c

x86-32: use non-lazy io bitmap context switching

2009-03-02 12:07:48 +01:00

tsc_sync.c

Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core

2008-12-23 16:27:23 +01:00

tsc.c

Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

2009-03-27 17:28:43 +01:00

uv_irq.c

x86, apic: remove genapic.h

2009-02-17 17:52:44 +01:00

uv_sysfs.c

x86: Add sysfs entries for UV v4

2008-10-16 16:53:13 +02:00

uv_time.c

x86: UV, SGI RTC: fix uv_time.c for UP

2009-03-05 11:27:49 +01:00

verify_cpu_64.S

…

visws_quirks.c

x86: convert obsolete irq_desc_t typedef to struct irq_desc

2009-03-11 09:49:01 +01:00

vm86_32.c

x86: use regparm(3) for passed-in pt_regs pointer

2009-02-11 14:00:56 -08:00

vmi_32.c

x86: with the last user gone, remove set_pte_present

2009-03-19 14:04:19 +01:00

vmiclock_32.c

cpumask: remove references to struct irqaction's mask field.

2009-03-30 22:05:14 +10:30

vmlinux_32.lds.S

x86-32: move _end to a dummy section

2009-03-17 14:16:02 -07:00

vmlinux_64.lds.S

x86/brk: put the brk reservations in their own section

2009-03-17 12:58:15 -07:00

vmlinux.lds.S

…

vsmp_64.c

Revert "x86: don't compile vsmp_64 for 32bit"

2009-03-25 21:34:28 +01:00

vsyscall_64.c

Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-12-28 12:21:10 -08:00

x8664_ksyms_64.c

x86: convert pda ops to wrappers around x86 percpu accessors

2009-01-16 14:20:22 +01:00

xsave.c

x86: add linux kernel support for YMM state

2009-04-12 13:08:56 +02:00