The patch titled
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by using smp_call_function_any()
has been removed from the -mm tree. Its filename was
arch-x86-kernel-cpu-cpufreq-acpi-cpufreqc-avoid-cross-cpu-interrupts-by-using-smp_call_function_any.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by using smp_call_function_any()
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Presently acpi-cpufreq will perform the MSR read on the first CPU in the
mask. That's inefficient if that CPU differs from the current CPU.
Because we have to perform a cross-CPU call, but we could have run the
rdmsr on the current CPU.
So switch to using the new smp_call_function_any(), which will perform the
call on the current CPU if that CPU is present in the mask (it is).
Cc: "Zhang, Yanmin" <yanmin_zhang@xxxxxxxxxxxxxxx>
Cc: Dave Jones <davej@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Jaswinder Singh Rajput <jaswinder@xxxxxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@xxxxxxxxx>
Cc: Zhao Yakui <yakui.zhao@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c~arch-x86-kernel-cpu-cpufreq-acpi-cpufreqc-avoid-cross-cpu-interrupts-by-using-smp_call_function_any arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c~arch-x86-kernel-cpu-cpufreq-acpi-cpufreqc-avoid-cross-cpu-interrupts-by-using-smp_call_function_any
+++ a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -190,9 +190,11 @@ static void do_drv_write(void *_cmd)
static void drv_read(struct drv_cmd *cmd)
{
+ int err;
cmd->val = 0;
- smp_call_function_single(cpumask_any(cmd->mask), do_drv_read, cmd, 1);
+ err = smp_call_function_any(cmd->mask, do_drv_read, cmd, 1);
+ WARN_ON_ONCE(err); /* smp_call_function_any() was buggy? */
}
static void drv_write(struct drv_cmd *cmd)
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
percpu-avoid-calling-__pcpu_ptr_to_addrnull.patch
zlib-optimize-inffast-when-copying-direct-from-output.patch
lib-add-support-for-lzo-compressed-kernels.patch
linux-next.patch
linux-next-fixup.patch
next-remove-localversion.patch
i-need-old-gcc.patch
revert-input-wistron_btns-switch-to-using-sparse-keymap-library.patch
drivers-media-video-cx23885-needs-kfifo-conversion.patch
drivers-gpu-drm-i915-i915_dmac-fix-unused-var.patch
drivers-gpu-drm-radeon-radeon_combiosc-fix-warning.patch
drivers-media-video-pmsc-needs-versionh.patch
hid-logitech-g13-driver-002-fix.patch
timer-stats-fix-del_timer_sync-and-try_to_del_timer_sync.patch
net-sctp-socketc-squish-warning.patch
proc_fops-convert-drivers-isdn-to-seq_file.patch
3x59x-fix-pci-resource-management.patch
net-netfilter-ipvs-ip_vs_wrrc-use-lib-gcdc.patch
fs-improve-remountro-vs-buffercache-coherency.patch
mm-avoid-false-sharing-of-mm_counter-checkpatch-fixes.patch
mm-count-swap-usage-checkpatch-fixes.patch
mm-add-lowmem-detection-logic-fix.patch
mm-count-lowmem-rss-checkpatch-fixes.patch
frv-duplicate-output_buffer-of-e03-checkpatch-fixes.patch
memcg-move-charges-of-anonymous-page-cleanup.patch
reiser4-export-remove_from_page_cache-fix.patch
reiser4.patch
reiser4-remove-simple_prepare_write-usage-checkpatch-fixes.patch
fs-reiser4-contextc-current_is_pdflush-got-removed.patch
reiser4-fix.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
getblk-handle-2tb-devices.patch
getblk-handle-2tb-devices-fix.patch
undeprecate-pci_find_device.patch
notify_change-callers-must-hold-i_mutex.patch
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