dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

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>
This commit is contained in:
Xiao Guangrong 2011-03-15 09:57:37 +08:00 committed by Ingo Molnar
parent 8460b3e5bc
commit 25542c646a
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/x86/mm/tlb.c
View File

@ -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);