From: Bart Van Assche <bvanassche@acm.org>
To: mingo@redhat.com
Cc: peterz@infradead.org, tj@kernel.org, longman@redhat.com,
johannes.berg@intel.com, linux-kernel@vger.kernel.org,
Bart Van Assche <bvanassche@acm.org>,
Johannes Berg <johannes@sipsolutions.net>
Subject: [PATCH v3 16/24] locking/lockdep: Retain the class key and name while freeing a lock class
Date: Thu, 6 Dec 2018 17:11:40 -0800 [thread overview]
Message-ID: <20181207011148.251812-17-bvanassche@acm.org> (raw)
In-Reply-To: <20181207011148.251812-1-bvanassche@acm.org>
The next patch in this series uses the class name in code that
detects calls to lock_acquire() while a class key is being freed. Hence
retain the class name for lock classes that are being freed.
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
kernel/locking/lockdep.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index ecd92969674c..92bdb187987f 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4147,10 +4147,8 @@ static void zap_class(struct lock_class *class)
* Unhash the class and remove it from the all_lock_classes list:
*/
hlist_del_rcu(&class->hash_entry);
+ class->hash_entry.pprev = NULL;
list_del(&class->lock_entry);
-
- RCU_INIT_POINTER(class->key, NULL);
- RCU_INIT_POINTER(class->name, NULL);
}
static inline int within(const void *addr, void *start, unsigned long size)
--
2.20.0.rc2.403.gdbc3b29805-goog
next prev parent reply other threads:[~2018-12-07 1:14 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-07 1:11 [PATCH v3 00/24] locking/lockdep: Add support for dynamic keys Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 01/24] lockdep tests: Display compiler warning and error messages Bart Van Assche
2018-12-11 15:22 ` [tip:locking/core] tools/lib/lockdep/tests: " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 02/24] lockdep tests: Fix shellcheck warnings Bart Van Assche
2018-12-11 15:23 ` [tip:locking/core] tools/lib/lockdep/tests: " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 03/24] lockdep tests: Improve testing accuracy Bart Van Assche
2018-12-11 15:23 ` [tip:locking/core] tools/lib/lockdep/tests: " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 04/24] lockdep tests: Run lockdep tests a second time under Valgrind Bart Van Assche
2018-12-11 15:24 ` [tip:locking/core] tools/lib/lockdep/tests: " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 05/24] liblockdep: Rename "trywlock" into "trywrlock" Bart Van Assche
2018-12-11 15:24 ` [tip:locking/core] tools/lib/lockdep: " tip-bot for Bart Van Assche
2018-12-11 17:19 ` [PATCH v3 05/24] liblockdep: " Sasha Levin
2018-12-11 17:38 ` Bart Van Assche
2018-12-13 19:41 ` Sasha Levin
2018-12-07 1:11 ` [PATCH v3 06/24] liblockdep: Add dummy print_irqtrace_events() implementation Bart Van Assche
2018-12-11 15:25 ` [tip:locking/core] tools/lib/lockdep: " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 07/24] lockdep tests: Test the lockdep_reset_lock() implementation Bart Van Assche
2018-12-11 15:26 ` [tip:locking/core] tools/lib/lockdep/tests: " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 08/24] locking/lockdep: Declare local symbols static Bart Van Assche
2018-12-11 15:26 ` [tip:locking/core] " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 09/24] locking/lockdep: Inline __lockdep_init_map() Bart Van Assche
2018-12-11 15:27 ` [tip:locking/core] " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 10/24] locking/lockdep: Introduce lock_class_cache_is_registered() Bart Van Assche
2018-12-11 15:27 ` [tip:locking/core] " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 11/24] locking/lockdep: Remove a superfluous INIT_LIST_HEAD() statement Bart Van Assche
2018-12-11 15:28 ` [tip:locking/core] " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 12/24] locking/lockdep: Make concurrent lockdep_reset_lock() calls safe Bart Van Assche
2018-12-11 15:29 ` [tip:locking/core] " tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 13/24] locking/lockdep: Stop using RCU primitives to access all_lock_classes Bart Van Assche
2018-12-11 15:29 ` [tip:locking/core] locking/lockdep: Stop using RCU primitives to access 'all_lock_classes' tip-bot for Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 14/24] locking/lockdep: Make zap_class() remove all matching lock order entries Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 15/24] locking/lockdep: Reorder struct lock_class members Bart Van Assche
2018-12-07 1:11 ` Bart Van Assche [this message]
2018-12-07 10:21 ` [PATCH v3 16/24] locking/lockdep: Retain the class key and name while freeing a lock class Peter Zijlstra
2018-12-07 14:50 ` Waiman Long
2018-12-07 16:23 ` Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 17/24] locking/lockdep: Free lock classes that are no longer in use Bart Van Assche
2018-12-07 12:14 ` Peter Zijlstra
2018-12-07 16:27 ` Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 18/24] locking/lockdep: Reuse list entries " Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 19/24] locking/lockdep: Check data structure consistency Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 20/24] locking/lockdep: Introduce __lockdep_free_key_range() Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 21/24] locking/lockdep: Verify whether lock objects are small enough to be used as class keys Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 22/24] locking/lockdep: Add support for dynamic keys Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 23/24] kernel/workqueue: Use dynamic lockdep keys for workqueues Bart Van Assche
2018-12-07 1:11 ` [PATCH v3 24/24] lockdep tests: Test dynamic key registration Bart Van Assche
2018-12-07 12:23 ` [PATCH v3 00/24] locking/lockdep: Add support for dynamic keys Peter Zijlstra
2018-12-07 16:35 ` Bart Van Assche
2018-12-08 10:26 ` Peter Zijlstra
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