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

[tip-bot for Frederic Weisbecker <tipbot@zytor.com>]

Commit-ID:  3c7169a3bf8216a56761a8edf775072dd36a00a0
Gitweb:     https://git.kernel.org/tip/3c7169a3bf8216a56761a8edf775072dd36a00a0
Author:     Frederic Weisbecker <frederic@kernel.org>
AuthorDate: Mon, 6 Nov 2017 16:01:26 +0100
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 8 Nov 2017 11:13:52 +0100

irq_work: 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/1509980490-4285-11-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/irq_work.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq_work.c b/kernel/irq_work.c
index bcf107c..8995796 100644
--- a/kernel/irq_work.c
+++ b/kernel/irq_work.c
@@ -188,7 +188,7 @@ void irq_work_tick(void)
  */
 void irq_work_sync(struct irq_work *work)
 {
-	WARN_ON_ONCE(irqs_disabled());
+	lockdep_assert_irqs_enabled();
 
 	while (work->flags & IRQ_WORK_BUSY)
 		cpu_relax();