Commit c9a863bb authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

sched/membarrier: synchronize_sched() with synchronize_rcu() 



Now that synchronize_rcu() waits for preempt-disable regions of code
as well as RCU read-side critical sections, synchronize_sched() can be
replaced by synchronize_rcu().  This commit therefore makes this change.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.ibm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
parent 51959d85

kernel/sched/membarrier.c

+2 −2
Original line number Diff line number Diff line
@@ -210,7 +210,7 @@ static int membarrier_register_global_expedited(void) 
		 * future scheduler executions will observe the new

		 * thread flag state for this mm.

		 */

		synchronize_sched();

		synchronize_rcu();

	}

	atomic_or(MEMBARRIER_STATE_GLOBAL_EXPEDITED_READY,

		  &mm->membarrier_state);
@@ -246,7 +246,7 @@ static int membarrier_register_private_expedited(int flags) 
		 * Ensure all future scheduler executions will observe the

		 * new thread flag state for this process.

		 */

		synchronize_sched();

		synchronize_rcu();

	}

	atomic_or(state, &mm->membarrier_state);

CRA Git | Maintained and supported by SUSTech CRA and CCSE