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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-09-07 14:18:36 -0700 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-09-07 14:18:36 -0700 |
commit | 7e66eaf14e19c032433be7c4df3c892fa2a5282f (patch) | |
tree | 56b0d5f9d16eb18744e102f3f216715196cd62e6 /arch/x86/kernel/process.c | |
parent | d3654d7ef3adad0083525cfb6fe27be62cb83d0d (diff) | |
parent | c6a389f123b9f68d605bb7e0f9b32ec1e3e14132 (diff) |
Merge commit 'v3.1-rc4' into next
Diffstat (limited to 'arch/x86/kernel/process.c')
-rw-r--r-- | arch/x86/kernel/process.c | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index e1ba8cb24e4..e7e3b019c43 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -438,29 +438,6 @@ void cpu_idle_wait(void) } EXPORT_SYMBOL_GPL(cpu_idle_wait); -/* - * This uses new MONITOR/MWAIT instructions on P4 processors with PNI, - * which can obviate IPI to trigger checking of need_resched. - * We execute MONITOR against need_resched and enter optimized wait state - * through MWAIT. Whenever someone changes need_resched, we would be woken - * up from MWAIT (without an IPI). - * - * New with Core Duo processors, MWAIT can take some hints based on CPU - * capability. - */ -void mwait_idle_with_hints(unsigned long ax, unsigned long cx) -{ - if (!need_resched()) { - if (this_cpu_has(X86_FEATURE_CLFLUSH_MONITOR)) - clflush((void *)¤t_thread_info()->flags); - - __monitor((void *)¤t_thread_info()->flags, 0, 0); - smp_mb(); - if (!need_resched()) - __mwait(ax, cx); - } -} - /* Default MONITOR/MWAIT with no hints, used for default C1 state */ static void mwait_idle(void) { |