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Commit 0bbcc529 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Add memory barriers 



Add the memory barriers added by e59fb312.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent ba9f207c

kernel/rcutree.c

+6 −0
Original line number Diff line number Diff line
@@ -907,6 +907,12 @@ static void rcu_report_qs_rsp(struct rcu_state *rsp, unsigned long flags) 
	unsigned long gp_duration;



	WARN_ON_ONCE(!rcu_gp_in_progress(rsp));



	/*

	 * Ensure that all grace-period and pre-grace-period activity

	 * is seen before the assignment to rsp->completed.

	 */

	smp_mb(); /* See above block comment. */

	gp_duration = jiffies - rsp->gp_start;

	if (gp_duration > rsp->gp_max)

		rsp->gp_max = gp_duration;