Messages in this thread Patch in this message | | | Date | Wed, 25 Oct 2017 04:11:02 -0700 | From | tip-bot for Byungchul Park <> | Subject | [tip:locking/core] locking/lockdep: Provide empty lockdep_map structure for !CONFIG_LOCKDEP |
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Commit-ID: 6f0397d7e100f3b3978d6ebb6b2dea29ee7c4a95 Gitweb: https://git.kernel.org/tip/6f0397d7e100f3b3978d6ebb6b2dea29ee7c4a95 Author: Byungchul Park <byungchul.park@lge.com> AuthorDate: Wed, 25 Oct 2017 17:55:58 +0900 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Wed, 25 Oct 2017 12:19:00 +0200
locking/lockdep: Provide empty lockdep_map structure for !CONFIG_LOCKDEP
After this patch the lockdep_map structure takes no space if lockdep is disabled, reducing the number of #ifdefs in unrelated kernel code.
Signed-off-by: Byungchul Park <byungchul.park@lge.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: amir73il@gmail.com Cc: axboe@kernel.dk Cc: darrick.wong@oracle.com Cc: david@fromorbit.com Cc: hch@infradead.org Cc: idryomov@gmail.com Cc: johan@kernel.org Cc: johannes.berg@intel.com Cc: kernel-team@lge.com Cc: linux-block@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Cc: linux-mm@kvack.org Cc: linux-xfs@vger.kernel.org Cc: oleg@redhat.com Cc: tj@kernel.org Link: http://lkml.kernel.org/r/1508921765-15396-3-git-send-email-byungchul.park@lge.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- 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)
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