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authorYao Dongdong <yaodongdong@huawei.com>2015-02-25 17:09:46 +0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-03-03 11:17:34 -0800
commit9910affa89fe0895153880b115ec243636e70af3 (patch)
treeab40cc06ff632e6abc46a3aa920575593de9248b /kernel/rcu
parente7580f33889299e484a80f42c20611ead42f199e (diff)
downloadlinux-9910affa89fe0895153880b115ec243636e70af3.tar.bz2
rcu: Remove redundant check of cpu_online()
Because invoke_cpu_core() checks whether the current CPU is online, there is no need for __call_rcu_core() to redundantly check it. There should not be any performance degradation because the called function is visible to the compiler. This commit therefore removes the redundant check. Signed-off-by: Yao Dongdong <yaodongdong@huawei.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/tree.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index fbe9dd9ced54..23194a77a768 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2741,7 +2741,7 @@ static void __call_rcu_core(struct rcu_state *rsp, struct rcu_data *rdp,
* If called from an extended quiescent state, invoke the RCU
* core in order to force a re-evaluation of RCU's idleness.
*/
- if (!rcu_is_watching() && cpu_online(smp_processor_id()))
+ if (!rcu_is_watching())
invoke_rcu_core();
/* If interrupts were disabled or CPU offline, don't invoke RCU core. */