linux-kernel - [tip:locking/core] workqueue: Use lockdep to assert IRQs are disabled/enabled

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Date:   Wed, 8 Nov 2017 02:52:49 -0800
From:   tip-bot for Frederic Weisbecker <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tj@...nel.org, frederic@...nel.org, hpa@...or.com,
        mingo@...nel.org, davem@...emloft.net,
        linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        jiangshanlai@...il.com, tglx@...utronix.de, peterz@...radead.org,
        paulmck@...ux.vnet.ibm.com
Subject: [tip:locking/core] workqueue: Use lockdep to assert IRQs are
 disabled/enabled

Commit-ID:  8e8eb730759f9cfd7a761b0b4ee41d714e720993
Gitweb:     https://git.kernel.org/tip/8e8eb730759f9cfd7a761b0b4ee41d714e720993
Author:     Frederic Weisbecker <frederic@...nel.org>
AuthorDate: Mon, 6 Nov 2017 16:01:19 +0100
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 8 Nov 2017 11:13:48 +0100

workqueue: 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@...nel.org>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Tejun Heo <tj@...nel.org>
Cc: David S . Miller <davem@...emloft.net>
Cc: Lai Jiangshan <jiangshanlai@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/1509980490-4285-4-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/workqueue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 1070b21..13f67b5 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -1376,7 +1376,7 @@ static void __queue_work(int cpu, struct workqueue_struct *wq,
 	 * queued or lose PENDING.  Grabbing PENDING and queueing should
 	 * happen with IRQ disabled.
 	 */
-	WARN_ON_ONCE(!irqs_disabled());
+	lockdep_assert_irqs_disabled();
 
 	debug_work_activate(work);