From: Frederic Weisbecker <frederic@kernel.org>
Date: Mon, 6 Nov 2017 15:01:25 +0000 (+0100)
Subject: irq/timings: Use lockdep to assert IRQs are disabled/enabled
X-Git-Tag: v4.15-rc1~161^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a934d4d15f040cdd254350e7270b35cc7521e12e;p=thirdparty%2Flinux.git

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@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David S . Miller <davem@davemloft.net>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/1509980490-4285-10-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/kernel/irq/timings.c b/kernel/irq/timings.c
index c8c1d073fbf14..e0923fa4927ac 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