From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f197.google.com (mail-pf0-f197.google.com [209.85.192.197]) by kanga.kvack.org (Postfix) with ESMTP id 9CD2B6B0069 for ; Wed, 25 Oct 2017 04:56:31 -0400 (EDT) Received: by mail-pf0-f197.google.com with SMTP id z80so20425553pff.11 for ; Wed, 25 Oct 2017 01:56:31 -0700 (PDT) Received: from lgeamrelo11.lge.com (LGEAMRELO11.lge.com. [156.147.23.51]) by mx.google.com with ESMTP id l124si1695191pfc.134.2017.10.25.01.56.29 for ; Wed, 25 Oct 2017 01:56:30 -0700 (PDT) From: Byungchul Park Subject: [PATCH v5 2/9] locking/lockdep: Provide empty lockdep_map structure for !CONFIG_LOCKDEP Date: Wed, 25 Oct 2017 17:55:58 +0900 Message-Id: <1508921765-15396-3-git-send-email-byungchul.park@lge.com> In-Reply-To: <1508921765-15396-1-git-send-email-byungchul.park@lge.com> References: <1508921765-15396-1-git-send-email-byungchul.park@lge.com> Sender: owner-linux-mm@kvack.org List-ID: To: peterz@infradead.org, mingo@kernel.org, axboe@kernel.dk Cc: johan@kernel.org, tglx@linutronix.de, linux-kernel@vger.kernel.org, linux-mm@kvack.org, tj@kernel.org, johannes.berg@intel.com, oleg@redhat.com, amir73il@gmail.com, david@fromorbit.com, darrick.wong@oracle.com, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, hch@infradead.org, idryomov@gmail.com, kernel-team@lge.com By this patch, the lockdep_map structure takes no space if lockdep is disabled, making a debug facility's impact on unreleated kernel less. Thanks to this, we don't need #ifdef to sparate code due to the lockdep_map structure. Signed-off-by: Byungchul Park --- include/linux/lockdep.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index bfa8e0b..b6662d0 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -527,6 +527,11 @@ static inline void lockdep_on(void) */ struct lock_class_key { }; +/* + * The lockdep_map takes no space if lockdep is disabled: + */ +struct lockdep_map { }; + #define lockdep_depth(tsk) (0) #define lockdep_is_held_type(l, r) (1) -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org