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author | Pekka Enberg <penberg@kernel.org> | 2011-09-19 17:46:07 +0300 |
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committer | Pekka Enberg <penberg@kernel.org> | 2011-09-19 17:46:07 +0300 |
commit | d20bbfab01802e195a50435940f7e4aa747c217c (patch) | |
tree | 82b0007e33c083050a4e60a49dbb2f5477b4c99d /arch/x86/kernel/process.c | |
parent | a37933c37c14b64e81c7c9cc44a5d3f5e0c91412 (diff) | |
parent | 136333d104bd3a62d783b0ac3d0f32ac0108c5d0 (diff) |
Merge branch 'slab/urgent' into slab/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 e1ba8cb24e4e..e7e3b019c439 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) { |