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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-05-09 18:06:51 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-07-09 09:14:35 -0700
commit4da117cfa72e6cde3d9e8f5ed932381863cdeec9 (patch)
tree4237aebb9bb34f6599904396d69a9818e8587b17 /kernel/rcu
parentb4426b49c65e0d266f8a9181ca51d5bf11407714 (diff)
downloadlinux-4da117cfa72e6cde3d9e8f5ed932381863cdeec9.tar.bz2
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 <paulmck@linux.vnet.ibm.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/tree_plugin.h2
1 files changed, 1 insertions, 1 deletions
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;