From f214737b75b0ee79763b5c058b9d5e83d711348d Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Thu, 14 Feb 2019 15:00:58 -0800
Subject: lockdep/lib/tests: Test dynamic key registration
Make sure that the lockdep_register_key() and lockdep_unregister_key()
code is tested when running the lockdep tests.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: johannes.berg@intel.com
Cc: tj@kernel.org
Link: https://lkml.kernel.org/r/20190214230058.196511-24-bvanassche@acm.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
tools/lib/lockdep/include/liblockdep/common.h | 2 ++
tools/lib/lockdep/include/liblockdep/mutex.h | 11 ++++++-----
2 files changed, 8 insertions(+), 5 deletions(-)
(limited to 'tools/lib/lockdep/include')
diff --git a/tools/lib/lockdep/include/liblockdep/common.h b/tools/lib/lockdep/include/liblockdep/common.h
index d640a9761f09..a81d91d4fc78 100644
--- a/tools/lib/lockdep/include/liblockdep/common.h
+++ b/tools/lib/lockdep/include/liblockdep/common.h
@@ -45,6 +45,8 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
void lock_release(struct lockdep_map *lock, int nested,
unsigned long ip);
void lockdep_reset_lock(struct lockdep_map *lock);
+void lockdep_register_key(struct lock_class_key *key);
+void lockdep_unregister_key(struct lock_class_key *key);
extern void debug_check_no_locks_freed(const void *from, unsigned long len);
#define STATIC_LOCKDEP_MAP_INIT(_name, _key) \
diff --git a/tools/lib/lockdep/include/liblockdep/mutex.h b/tools/lib/lockdep/include/liblockdep/mutex.h
index 2073d4e1f2f0..783dd0df06f9 100644
--- a/tools/lib/lockdep/include/liblockdep/mutex.h
+++ b/tools/lib/lockdep/include/liblockdep/mutex.h
@@ -7,6 +7,7 @@
struct liblockdep_pthread_mutex {
pthread_mutex_t mutex;
+ struct lock_class_key key;
struct lockdep_map dep_map;
};
@@ -27,11 +28,10 @@ static inline int __mutex_init(liblockdep_pthread_mutex_t *lock,
return pthread_mutex_init(&lock->mutex, __mutexattr);
}
-#define liblockdep_pthread_mutex_init(mutex, mutexattr) \
-({ \
- static struct lock_class_key __key; \
- \
- __mutex_init((mutex), #mutex, &__key, (mutexattr)); \
+#define liblockdep_pthread_mutex_init(mutex, mutexattr) \
+({ \
+ lockdep_register_key(&(mutex)->key); \
+ __mutex_init((mutex), #mutex, &(mutex)->key, (mutexattr)); \
})
static inline int liblockdep_pthread_mutex_lock(liblockdep_pthread_mutex_t *lock)
@@ -55,6 +55,7 @@ static inline int liblockdep_pthread_mutex_trylock(liblockdep_pthread_mutex_t *l
static inline int liblockdep_pthread_mutex_destroy(liblockdep_pthread_mutex_t *lock)
{
lockdep_reset_lock(&lock->dep_map);
+ lockdep_unregister_key(&lock->key);
return pthread_mutex_destroy(&lock->mutex);
}
--
cgit v1.2.3