From: Paul E. McKenney Date: Sat, 10 May 2014 01:06:51 +0000 (-0700) Subject: rcu: remove redundant ACCESS_ONCE() from tick_do_timer_cpu X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4ca2b785c27b8e91a2cf2273816346273f9ea478;p=karo-tx-linux.git 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 --- 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;