From ea00c30b5b31baa91be29bee966204eccc15e9d3 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Tue, 26 Oct 2010 14:23:09 -0700 Subject: [PATCH] percpu_counter: use this_cpu_ptr() instead of per_cpu_ptr() this_cpu_ptr() avoids an array lookup and can use the percpu offset of the local cpu directly. Signed-off-by: Christoph Lameter Cc: Eric Dumazet Cc: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- lib/percpu_counter.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c index 1d954ea72331..604678d7d06d 100644 --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -73,9 +73,9 @@ void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch) { s64 count; s32 *pcount; - int cpu = get_cpu(); - pcount = per_cpu_ptr(fbc->counters, cpu); + preempt_disable(); + pcount = this_cpu_ptr(fbc->counters); count = *pcount + amount; if (count >= batch || count <= -batch) { spin_lock(&fbc->lock); @@ -85,7 +85,7 @@ void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch) } else { *pcount = count; } - put_cpu(); + preempt_enable(); } EXPORT_SYMBOL(__percpu_counter_add); -- 2.20.1