[PATCH 04/16] rcu: Remove redundant check for an online CPU

Pranith Kumar
2014-07-23T05:10:49Z

rcu_prcess_callbacks() is the softirq handler for RCU which is raised from
invoke_rcu_core() which is called from __call_rcu_core().

Each of these three functions checks if the cpu is online. We can remove the
redundant ones. This commit removes one of these redundant check.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
---
kernel/rcu/tree.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 72e0b1f..044946e 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2563,8 +2563,6 @@ static void rcu_process_callbacks(struct softirq_action *unused)
{
struct rcu_state *rsp;

- if (cpu_is_offline(smp_processor_id()))
- return;
trace_rcu_utilization(TPS("Start RCU core"));
for_each_rcu_flavor(rsp)
__rcu_process_callbacks(rsp);
--
2.0.0.rc2