From: Byungchul Park <byungchul.park@lge.com>
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
Subject: [PATCH v5 2/9] locking/lockdep: Provide empty lockdep_map structure for !CONFIG_LOCKDEP
Date: Wed, 25 Oct 2017 17:55:58 +0900 [thread overview]
Message-ID: <1508921765-15396-3-git-send-email-byungchul.park@lge.com> (raw)
In-Reply-To: <1508921765-15396-1-git-send-email-byungchul.park@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 <byungchul.park@lge.com>
---
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
WARNING: multiple messages have this Message-ID (diff)
From: Byungchul Park <byungchul.park@lge.com>
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
Subject: [PATCH v5 2/9] locking/lockdep: Provide empty lockdep_map structure for !CONFIG_LOCKDEP
Date: Wed, 25 Oct 2017 17:55:58 +0900 [thread overview]
Message-ID: <1508921765-15396-3-git-send-email-byungchul.park@lge.com> (raw)
In-Reply-To: <1508921765-15396-1-git-send-email-byungchul.park@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 <byungchul.park@lge.com>
---
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
--
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next prev parent reply other threads:[~2017-10-25 8:55 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-25 8:55 [PATCH v5 0/9] cross-release: Enhence performance and fix false positives Byungchul Park
2017-10-25 8:55 ` Byungchul Park
2017-10-25 8:55 ` [PATCH v5 1/9] block: use DECLARE_COMPLETION_ONSTACK in submit_bio_wait Byungchul Park
2017-10-25 8:55 ` Byungchul Park
2017-10-25 11:10 ` [tip:locking/core] block: Use DECLARE_COMPLETION_ONSTACK() in submit_bio_wait() tip-bot for Christoph Hellwig
2017-10-25 8:55 ` Byungchul Park [this message]
2017-10-25 8:55 ` [PATCH v5 2/9] locking/lockdep: Provide empty lockdep_map structure for !CONFIG_LOCKDEP Byungchul Park
2017-10-25 11:11 ` [tip:locking/core] " tip-bot for Byungchul Park
2017-10-25 8:55 ` [PATCH v5 3/9] completion: Change the prefix of lock name for completion variable Byungchul Park
2017-10-25 8:55 ` Byungchul Park
2017-10-25 11:11 ` [tip:locking/core] locking/lockdep, sched/completions: Change the prefix of lock name for completion variables tip-bot for Byungchul Park
2017-10-25 8:56 ` [PATCH v5 4/9] locking/lockdep: Add a boot parameter allowing unwind in cross-release and disable it by default Byungchul Park
2017-10-25 8:56 ` Byungchul Park
2017-10-25 11:11 ` [tip:locking/core] " tip-bot for Byungchul Park
2017-10-25 8:56 ` [PATCH v5 5/9] locking/lockdep: Remove the BROKEN flag from CONFIG_LOCKDEP_CROSSRELEASE and CONFIG_LOCKDEP_COMPLETIONS Byungchul Park
2017-10-25 8:56 ` Byungchul Park
2017-10-25 11:12 ` [tip:locking/core] " tip-bot for Byungchul Park
2017-10-25 8:56 ` [PATCH v5 6/9] locking/lockdep: Introduce CONFIG_BOOTPARAM_LOCKDEP_CROSSRELEASE_FULLSTACK Byungchul Park
2017-10-25 8:56 ` Byungchul Park
2017-10-25 11:12 ` [tip:locking/core] locking/lockdep: Introduce CONFIG_BOOTPARAM_LOCKDEP_CROSSRELEASE_FULLSTACK=y tip-bot for Byungchul Park
2017-10-25 8:56 ` [PATCH v5 7/9] completion: Add support for initializing completion with lockdep_map Byungchul Park
2017-10-25 8:56 ` Byungchul Park
2017-10-25 11:12 ` [tip:locking/core] sched/completions: Add support for initializing completions " tip-bot for Byungchul Park
2017-10-25 8:56 ` [PATCH v5 8/9] workqueue: Remove unnecessary acquisitions wrt workqueue flush Byungchul Park
2017-10-25 8:56 ` Byungchul Park
2017-10-25 11:13 ` [tip:locking/core] workqueue: Remove now redundant lock acquisitions wrt. workqueue flushes tip-bot for Byungchul Park
2017-10-25 8:56 ` [PATCH v5 9/9] block: Assign a lock_class per gendisk used for wait_for_completion() Byungchul Park
2017-10-25 8:56 ` Byungchul Park
2017-10-25 10:13 ` Ingo Molnar
2017-10-25 10:13 ` Ingo Molnar
2017-10-25 10:13 ` Ingo Molnar
2017-10-25 10:13 ` Ingo Molnar
2017-10-25 18:20 ` Jens Axboe
2017-10-25 18:20 ` Jens Axboe
2017-10-26 5:50 ` Ingo Molnar
2017-10-26 5:50 ` Ingo Molnar
2017-10-26 5:58 ` Byungchul Park
2017-10-26 5:58 ` Byungchul Park
2017-10-26 9:31 ` [tip:locking/core] block, locking/lockdep: " tip-bot for Byungchul Park
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