rcu: Replace smp_wmb() with smp_store_release() for stall check (91f63ced) · Commits · 戴 / test

kernel/rcu/tree.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1246,9 +1246,9 @@ static void record_gp_stall_check_time(struct rcu_state *rsp)
		unsigned long j1;

		rsp->gp_start = j;
		smp_wmb(); /* Record start time before stall time. */
		j1 = rcu_jiffies_till_stall_check();
		WRITE_ONCE(rsp->jiffies_stall, j + j1);
		/* Record ->gp_start before ->jiffies_stall. */
		smp_store_release(&rsp->jiffies_stall, j + j1); /* ^^^ */
		rsp->jiffies_resched = j + j1 / 2;
		rsp->n_force_qs_gpstart = READ_ONCE(rsp->n_force_qs);
		}