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fs: Use this_cpu_inc_return in buffer.c 

__this_cpu_inc can create a single instruction with the same effect
as the _get_cpu_var(..)++ construct in buffer.c.

Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Christoph Hellwig <hch@lst.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Christoph Lameter 2010-12-06 11:40:05 -06:00 committed by Tejun Heo
parent cfb8243495
commit ee1be86263
1 changed files with 1 additions and 1 deletions
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fs/buffer.c
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@ -3201,7 +3201,7 @@ static void recalc_bh_state(void)
int i;
int tot = 0;
if (__get_cpu_var(bh_accounting).ratelimit++ < 4096)
if (__this_cpu_inc_return(bh_accounting.ratelimit) - 1 < 4096)
return;
__this_cpu_write(bh_accounting.ratelimit, 0);
for_each_online_cpu(i)