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| author |   Byungchul Park <byungchul.park@lge.com> | 2017-10-25 17:55:58 +0900 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2017-10-25 12:19:00 +0200 |
| commit | 6f0397d7e100f3b3978d6ebb6b2dea29ee7c4a95 (patch) | |
| tree | 3ba81e38c591efdfcff2b4cdd91b1fdbb22701a8 /include/linux/lockdep.h | |
| parent | block: Use DECLARE_COMPLETION_ONSTACK() in submit_bio_wait() (diff) | |
| download | linux-dev-6f0397d7e100f3b3978d6ebb6b2dea29ee7c4a95.tar.xz linux-dev-6f0397d7e100f3b3978d6ebb6b2dea29ee7c4a95.zip | |
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>
Diffstat (limited to 'include/linux/lockdep.h')
| -rw-r--r-- | include/linux/lockdep.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index bfa8e0b0d6f1..b6662d05bcda 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) |