From 18d7e40679ef574e428f893101be1c0035e95ee3 Mon Sep 17 00:00:00 2001 From: Cyrill Gorcunov Date: Thu, 24 Jan 2019 21:14:37 +0300 Subject: 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 Signed-off-by: Cyrill Gorcunov Signed-off-by: Paul E. McKenney --- kernel/rcu/tiny.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/rcu/tiny.c') 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); } -- cgit