Commit a934d4d1 authored Nov 06, 2017 by Frederic Weisbecker Committed by Ingo Molnar Nov 08, 2017

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>

parent 16444645

kernel/irq/timings.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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

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