Commit 25542c64 authored Mar 15, 2011 by Xiao Guangrong Committed by Ingo Molnar Mar 15, 2011

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>

parent 8460b3e5

arch/x86/mm/tlb.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -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);