[tip:locking/core] irq/timings: Use lockdep to assert IRQs are disabled/enabled

[tip-bot for Frederic Weisbecker]

Commit-ID:  a934d4d15f040cdd254350e7270b35cc7521e12e
Gitweb:     https://git.kernel.org/tip/a934d4d15f040cdd254350e7270b35cc7521e12e
Author:     Frederic Weisbecker <frederic@xxxxxxxxxx>
AuthorDate: Mon, 6 Nov 2017 16:01:25 +0100
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 8 Nov 2017 11:13:52 +0100

irq/timings: Use lockdep to assert IRQs are disabled/enabled

Use lockdep to check that IRQs are enabled or disabled as expected. This
way the sanity check only shows overhead when concurrency correctness
debug code is enabled.

Signed-off-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: David S . Miller <davem@xxxxxxxxxxxxx>
Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1509980490-4285-10-git-send-email-frederic@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/irq/timings.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/timings.c b/kernel/irq/timings.c
index c8c1d07..e0923fa 100644
--- a/kernel/irq/timings.c
+++ b/kernel/irq/timings.c
@@ -264,7 +264,7 @@ u64 irq_timings_next_event(u64 now)
 	 * order to prevent the timings circular buffer to be updated
 	 * while we are reading it.
 	 */
-	WARN_ON_ONCE(!irqs_disabled());
+	lockdep_assert_irqs_disabled();
 
 	/*
 	 * Number of elements in the circular buffer: If it happens it