Messages in this thread Patch in this message | | | Date | Tue, 15 Mar 2011 07:49:08 GMT | From | tip-bot for Xiao Guangrong <> | Subject | [tip:x86/mm] x86, tlb, UV: Do small micro-optimization for native_flush_tlb_others() |
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Commit-ID: 25542c646afbf14c43fa7d2b443055cadb73b07a Gitweb: http://git.kernel.org/tip/25542c646afbf14c43fa7d2b443055cadb73b07a Author: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> AuthorDate: Tue, 15 Mar 2011 09:57:37 +0800 Committer: Ingo Molnar <mingo@elte.hu> CommitDate: Tue, 15 Mar 2011 08:30:34 +0100
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> --- 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 55272d7..d6c0418 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);
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