Commit 78d125d3 authored Jul 11, 2018 by Paul E. McKenney Committed by Paul E. McKenney Nov 08, 2018

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 <paulmck@linux.vnet.ibm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

parent d3ff3891

kernel/sched/membarrier.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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();

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