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>

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. */