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authorCyrill Gorcunov <gorcunov@gmail.com>2019-01-24 21:14:37 +0300
committerPaul E. McKenney <paulmck@linux.ibm.com>2019-03-26 14:37:49 -0700
commit18d7e40679ef574e428f893101be1c0035e95ee3 (patch)
treebf75bb044a0e0b708294a3f1b4253b65a022ff03
parent671a63517cf983ad8eaa324167165cef245ab744 (diff)
downloadlinux-18d7e40679ef574e428f893101be1c0035e95ee3.tar.bz2
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>
-rw-r--r--kernel/rcu/tiny.c2
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);
}