From: "Paul E. McKenney" <paul...@linux.vnet.ibm.com>
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 <paul...@linux.vnet.ibm.com>
---
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;
--
1.8.1.5
--
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