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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-05-10 03:06:51 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-07-09 18:14:35 +0200 |
| commit | 4da117cfa72e6cde3d9e8f5ed932381863cdeec9 (patch) | |
| tree | 4237aebb9bb34f6599904396d69a9818e8587b17 /kernel/rcu | |
| parent | rcu: Make rcu node arrays static const char * const (diff) | |
| download | linux-4da117cfa72e6cde3d9e8f5ed932381863cdeec9.tar.xz linux-4da117cfa72e6cde3d9e8f5ed932381863cdeec9.zip | |
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.h | 2 |
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; |