linux/arch
Andrew Morton 4a28395d72 arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by using smp_call_function_any()
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@linux.intel.com>
Cc: Dave Jones <davej@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jaswinder Singh Rajput <jaswinder@kernel.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2009-12-22 15:03:57 -05:00
..
alpha Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-12-17 08:31:01 -08:00
arm Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 2009-12-17 16:57:49 -08:00
avr32 Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
blackfin Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
cris Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
frv Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
h8300 Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
ia64 Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
m32r elf: kill USE_ELF_CORE_DUMP 2009-12-16 07:20:12 -08:00
m68k Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
m68knommu
microblaze Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
mips Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus 2009-12-17 16:38:06 -08:00
mn10300 Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
parisc Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
powerpc Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
s390 Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
score Merge branch 'for-linus' of git://gitserver.sunplusct.com/linux-2.6-score 2009-12-17 08:08:57 -08:00
sh Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
sparc Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-12-17 08:31:01 -08:00
um Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
x86 arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts by using smp_call_function_any() 2009-12-22 15:03:57 -05:00
xtensa Merge branch 'for-33' of git://repo.or.cz/linux-kbuild 2009-12-17 07:23:42 -08:00
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