From: Paul E. McKenney Date: Wed, 11 Jul 2018 22:36:43 +0000 (-0700) Subject: sched/membarrier: Replace synchronize_sched() with synchronize_rcu() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=78d125d33858d00756baf0f40e75e77dcbfbea55;p=linux.git sched/membarrier: Replace synchronize_sched() with synchronize_rcu() Now that synchronize_rcu() waits for preempt-disable regions of code as well as RCU read-side critical sections, the synchronize_sched() in sys_membarrier() can be replaced by synchronize_rcu(). This commit therefore makes this change. Signed-off-by: Paul E. McKenney Cc: Mathieu Desnoyers --- diff --git a/kernel/sched/membarrier.c b/kernel/sched/membarrier.c index 76e0eaf4654e0..388a7a6c1aa2c 100644 --- a/kernel/sched/membarrier.c +++ b/kernel/sched/membarrier.c @@ -298,7 +298,7 @@ SYSCALL_DEFINE2(membarrier, int, cmd, int, flags) if (tick_nohz_full_enabled()) return -EINVAL; if (num_online_cpus() > 1) - synchronize_sched(); + synchronize_rcu(); return 0; case MEMBARRIER_CMD_GLOBAL_EXPEDITED: return membarrier_global_expedited();