From 6c8557bdb28df3ae97476c5e2aed6373cd235aab Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Fri, 19 May 2017 12:58:25 +0200 Subject: smp, cpumask: Use non-atomic cpumask_{set,clear}_cpu() The cpumasks in smp_call_function_many() are private and not subject to concurrency, atomic bitops are pointless and expensive. Signed-off-by: Peter Zijlstra (Intel) Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar --- kernel/smp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'kernel') diff --git a/kernel/smp.c b/kernel/smp.c index 76d16fe3c427..3061483cb3ad 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -436,7 +436,7 @@ void smp_call_function_many(const struct cpumask *mask, cfd = this_cpu_ptr(&cfd_data); cpumask_and(cfd->cpumask, mask, cpu_online_mask); - cpumask_clear_cpu(this_cpu, cfd->cpumask); + __cpumask_clear_cpu(this_cpu, cfd->cpumask); /* Some callers race with other cpus changing the passed mask */ if (unlikely(!cpumask_weight(cfd->cpumask))) @@ -452,7 +452,7 @@ void smp_call_function_many(const struct cpumask *mask, csd->func = func; csd->info = info; if (llist_add(&csd->llist, &per_cpu(call_single_queue, cpu))) - cpumask_set_cpu(cpu, cfd->cpumask_ipi); + __cpumask_set_cpu(cpu, cfd->cpumask_ipi); } /* Send a message to all CPUs in the map */ -- cgit v1.2.3