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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-03-15 02:57:37 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-03-15 08:30:34 +0100 |
| commit | 25542c646afbf14c43fa7d2b443055cadb73b07a (patch) | |
| tree | bb49d9918ecf8b2677282bcdbf222949399a5d06 | |
| parent | Merge commit 'v2.6.38' into x86/mm (diff) | |
| download | linux-25542c646afbf14c43fa7d2b443055cadb73b07a.tar.xz linux-25542c646afbf14c43fa7d2b443055cadb73b07a.zip | |
x86, tlb, UV: Do small micro-optimization for native_flush_tlb_others()
native_flush_tlb_others() is called from:
flush_tlb_current_task()
flush_tlb_mm()
flush_tlb_page()
All these functions disable preemption explicitly, so we can use
smp_processor_id() instead of get_cpu() and put_cpu().
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Cliff Wickman <cpw@sgi.com>
LKML-Reference: <4D7EC791.4040003@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/mm/tlb.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index 55272d7c3b0b..d6c0418c3e47 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -208,11 +208,10 @@ void native_flush_tlb_others(const struct cpumask *cpumask, if (is_uv_system()) { unsigned int cpu; - cpu = get_cpu(); + cpu = smp_processor_id(); cpumask = uv_flush_tlb_others(cpumask, mm, va, cpu); if (cpumask) flush_tlb_others_ipi(cpumask, mm, va); - put_cpu(); return; } flush_tlb_others_ipi(cpumask, mm, va); |