rcu: rcu_qs -- Use raise_softirq_irqoff to not save irqs twice

The rcu_qs is disabling IRQs by self so no need to do the same in raise_softirq
but instead we can save some cycles using raise_softirq_irqoff directly.

CC: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c
index 911bd9076d43..477b4eb44af5 100644
--- a/kernel/rcu/tiny.c
+++ b/kernel/rcu/tiny.c
@@ -52,7 +52,7 @@ void rcu_qs(void)
         local_irq_save(flags);
         if (rcu_ctrlblk.donetail != rcu_ctrlblk.curtail) {
                 rcu_ctrlblk.donetail = rcu_ctrlblk.curtail;
-                raise_softirq(RCU_SOFTIRQ);
+                raise_softirq_irqoff(RCU_SOFTIRQ);
         }
         local_irq_restore(flags);
 }