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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>
This commit is contained in:
Paul E. McKenney 2018-07-11 15:36:43 -07:00 committed by Paul E. McKenney
parent d3ff3891b2
commit 78d125d338
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/membarrier.c
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@ -298,7 +298,7 @@ SYSCALL_DEFINE2(membarrier, int, cmd, int, flags)
if (tick_nohz_full_enabled()) if (tick_nohz_full_enabled())
return -EINVAL; return -EINVAL;
if (num_online_cpus() > 1) if (num_online_cpus() > 1)
synchronize_sched(); synchronize_rcu();
return 0; return 0;
case MEMBARRIER_CMD_GLOBAL_EXPEDITED: case MEMBARRIER_CMD_GLOBAL_EXPEDITED:
return membarrier_global_expedited(); return membarrier_global_expedited();