From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751826AbdJTA4p (ORCPT ); Thu, 19 Oct 2017 20:56:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:46404 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751770AbdJTA4m (ORCPT ); Thu, 19 Oct 2017 20:56:42 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D09C2192A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=frederic@kernel.org From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Tejun Heo , Peter Zijlstra , "David S . Miller" , Lai Jiangshan , Thomas Gleixner , "Paul E . McKenney" , Ingo Molnar Subject: [PATCH 09/14] irq/timings: Use lockdep to assert IRQs are disabled/enabled Date: Fri, 20 Oct 2017 02:56:06 +0200 Message-Id: <1508460971-8731-10-git-send-email-frederic@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1508460971-8731-1-git-send-email-frederic@kernel.org> References: <1508460971-8731-1-git-send-email-frederic@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Paul E. McKenney --- 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 -- 2.7.4