[PATCH] lockdep: prove spinlock rwlock locking correctness
Use the lock validator framework to prove spinlock and rwlock locking
correctness.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h
index f5d4ed7..dc5fb69 100644
--- a/include/linux/spinlock_types.h
+++ b/include/linux/spinlock_types.h
@@ -9,6 +9,8 @@
* Released under the General Public License (GPL).
*/
+#include <linux/lockdep.h>
+
#if defined(CONFIG_SMP)
# include <asm/spinlock_types.h>
#else
@@ -24,6 +26,9 @@
unsigned int magic, owner_cpu;
void *owner;
#endif
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ struct lockdep_map dep_map;
+#endif
} spinlock_t;
#define SPINLOCK_MAGIC 0xdead4ead
@@ -37,28 +42,47 @@
unsigned int magic, owner_cpu;
void *owner;
#endif
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ struct lockdep_map dep_map;
+#endif
} rwlock_t;
#define RWLOCK_MAGIC 0xdeaf1eed
#define SPINLOCK_OWNER_INIT ((void *)-1L)
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define SPIN_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
+#else
+# define SPIN_DEP_MAP_INIT(lockname)
+#endif
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
+#else
+# define RW_DEP_MAP_INIT(lockname)
+#endif
+
#ifdef CONFIG_DEBUG_SPINLOCK
# define __SPIN_LOCK_UNLOCKED(lockname) \
(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
.magic = SPINLOCK_MAGIC, \
.owner = SPINLOCK_OWNER_INIT, \
- .owner_cpu = -1 }
+ .owner_cpu = -1, \
+ SPIN_DEP_MAP_INIT(lockname) }
#define __RW_LOCK_UNLOCKED(lockname) \
(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
.magic = RWLOCK_MAGIC, \
.owner = SPINLOCK_OWNER_INIT, \
- .owner_cpu = -1 }
+ .owner_cpu = -1, \
+ RW_DEP_MAP_INIT(lockname) }
#else
# define __SPIN_LOCK_UNLOCKED(lockname) \
- (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED }
+ (spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
+ SPIN_DEP_MAP_INIT(lockname) }
#define __RW_LOCK_UNLOCKED(lockname) \
- (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED }
+ (rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
+ RW_DEP_MAP_INIT(lockname) }
#endif
#define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init)