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 <[email protected]> Cc: Christoph Hellwig <[email protected]> Acked-by: H. Peter Anvin <[email protected]> Signed-off-by: Christoph Lameter <[email protected]> Signed-off-by: Tejun Heo <[email protected]>
ambv · Dec 17, 2010 · ee1be86 · ee1be86
1 parent cfb8243
commit ee1be86
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/buffer.c b/fs/buffer.c
@@ -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)