Commit-ID: 3a60799269daff5ed254a9b473a8db6f0f5c6bd9
Gitweb: http://git.kernel.org/tip/3a60799269daff5ed254a9b473a8db6f0f5c6bd9
Author: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
AuthorDate: Wed, 12 Jul 2017 07:59:54 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 17 Aug 2017 07:26:24 -0700
rcu: Make rcu_idle_enter() rely on callers disabling irqs
All callers to rcu_idle_enter() have irqs disabled, so there is no
point in rcu_idle_enter disabling them again. This commit therefore
replaces the irq disabling with a RCU_LOCKDEP_WARN().
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/tree.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index ac2617d..76f88b6 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -843,11 +843,8 @@ static void rcu_eqs_enter(bool user)
*/
void rcu_idle_enter(void)
{
- unsigned long flags;
-
- local_irq_save(flags);
+ RCU_LOCKDEP_WARN(!irqs_disabled(), "rcu_idle_enter() invoked with irqs enabled!!!");
rcu_eqs_enter(false);
- local_irq_restore(flags);
}
EXPORT_SYMBOL_GPL(rcu_idle_enter);
--
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