From 4da117cfa72e6cde3d9e8f5ed932381863cdeec9 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 9 May 2014 18:06:51 -0700 Subject: [PATCH] rcu: Remove redundant ACCESS_ONCE() from tick_do_timer_cpu In kernels built with CONFIG_NO_HZ_FULL, tick_do_timer_cpu is constant once boot completes. Thus, there is no need to wrap it in ACCESS_ONCE() in code that is built only when CONFIG_NO_HZ_FULL. This commit therefore removes the redundant ACCESS_ONCE(). Signed-off-by: Paul E. McKenney Acked-by: Frederic Weisbecker Reviewed-by: Lai Jiangshan --- kernel/rcu/tree_plugin.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 02ac0fb186b8..5da9f9b3abc9 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -2844,7 +2844,7 @@ static bool rcu_nohz_full_cpu(struct rcu_state *rsp) static void rcu_bind_gp_kthread(void) { #ifdef CONFIG_NO_HZ_FULL - int cpu = ACCESS_ONCE(tick_do_timer_cpu); + int cpu = tick_do_timer_cpu; if (cpu < 0 || cpu >= nr_cpu_ids) return; -- GitLab