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| author | Yao Dongdong <yaodongdong@huawei.com> | 2015-02-25 17:09:46 +0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-03-03 11:17:34 -0800 |
| commit | 9910affa89fe0895153880b115ec243636e70af3 (patch) | |
| tree | ab40cc06ff632e6abc46a3aa920575593de9248b /kernel/rcu | |
| parent | e7580f33889299e484a80f42c20611ead42f199e (diff) | |
| download | linux-9910affa89fe0895153880b115ec243636e70af3.tar.gz linux-9910affa89fe0895153880b115ec243636e70af3.tar.bz2 linux-9910affa89fe0895153880b115ec243636e70af3.zip | |
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.c | 2 |
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. */ |