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[PATCH] lockdep: prove spinlock rwlock locking correctness

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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>
This commit is contained in:
Ingo Molnar
2006-07-03 00:24:54 -07:00
committed by Linus Torvalds
parent 4ea2176dfa
commit 8a25d5debf
13 changed files with 217 additions and 34 deletions
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63
include/linux/spinlock.h
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@@ -82,14 +82,40 @@ extern int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock);
/*
* Pull the __raw*() functions/declarations (UP-nondebug doesnt need them):
*/
#if defined(CONFIG_SMP)
#ifdef CONFIG_SMP
# include <asm/spinlock.h>
#else
# include <linux/spinlock_up.h>
#endif
#define spin_lock_init(lock) do { *(lock) = SPIN_LOCK_UNLOCKED; } while (0)
#define rwlock_init(lock) do { *(lock) = RW_LOCK_UNLOCKED; } while (0)
#ifdef CONFIG_DEBUG_SPINLOCK
extern void __spin_lock_init(spinlock_t *lock, const char *name,
struct lock_class_key *key);
# define spin_lock_init(lock) \
do { \
static struct lock_class_key __key; \
\
__spin_lock_init((lock), #lock, &__key); \
} while (0)
#else
# define spin_lock_init(lock) \
do { *(lock) = SPIN_LOCK_UNLOCKED; } while (0)
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
extern void __rwlock_init(rwlock_t *lock, const char *name,
struct lock_class_key *key);
# define rwlock_init(lock) \
do { \
static struct lock_class_key __key; \
\
__rwlock_init((lock), #lock, &__key); \
} while (0)
#else
# define rwlock_init(lock) \
do { *(lock) = RW_LOCK_UNLOCKED; } while (0)
#endif
#define spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock)
@@ -113,7 +139,6 @@ extern int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock);
#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
extern int _raw_spin_trylock(spinlock_t *lock);
extern void _raw_spin_unlock(spinlock_t *lock);
extern void _raw_read_lock(rwlock_t *lock);
extern int _raw_read_trylock(rwlock_t *lock);
extern void _raw_read_unlock(rwlock_t *lock);
@@ -121,17 +146,17 @@ extern int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock);
extern int _raw_write_trylock(rwlock_t *lock);
extern void _raw_write_unlock(rwlock_t *lock);
#else
# define _raw_spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
# define _raw_spin_trylock(lock) __raw_spin_trylock(&(lock)->raw_lock)
# define _raw_spin_lock(lock) __raw_spin_lock(&(lock)->raw_lock)
# define _raw_spin_lock_flags(lock, flags) \
__raw_spin_lock_flags(&(lock)->raw_lock, *(flags))
# define _raw_spin_trylock(lock) __raw_spin_trylock(&(lock)->raw_lock)
# define _raw_spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
# define _raw_read_lock(rwlock) __raw_read_lock(&(rwlock)->raw_lock)
# define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock)
# define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock)
# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock)
# define _raw_read_trylock(rwlock) __raw_read_trylock(&(rwlock)->raw_lock)
# define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock)
# define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock)
# define _raw_write_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock)
# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock)
#endif
#define read_can_lock(rwlock) __raw_read_can_lock(&(rwlock)->raw_lock)
@@ -147,6 +172,13 @@ extern int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock);
#define write_trylock(lock) __cond_lock(_write_trylock(lock))
#define spin_lock(lock) _spin_lock(lock)
#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define spin_lock_nested(lock, subclass) _spin_lock_nested(lock, subclass)
#else
# define spin_lock_nested(lock, subclass) _spin_lock(lock)
#endif
#define write_lock(lock) _write_lock(lock)
#define read_lock(lock) _read_lock(lock)
@@ -172,21 +204,18 @@ extern int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock);
/*
* We inline the unlock functions in the nondebug case:
*/
#if defined(CONFIG_DEBUG_SPINLOCK) || defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP)
#if defined(CONFIG_DEBUG_SPINLOCK) || defined(CONFIG_PREEMPT) || \
!defined(CONFIG_SMP)
# define spin_unlock(lock) _spin_unlock(lock)
# define read_unlock(lock) _read_unlock(lock)
# define write_unlock(lock) _write_unlock(lock)
#else
# define spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
# define read_unlock(lock) __raw_read_unlock(&(lock)->raw_lock)
# define write_unlock(lock) __raw_write_unlock(&(lock)->raw_lock)
#endif
#if defined(CONFIG_DEBUG_SPINLOCK) || defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP)
# define spin_unlock_irq(lock) _spin_unlock_irq(lock)
# define read_unlock_irq(lock) _read_unlock_irq(lock)
# define write_unlock_irq(lock) _write_unlock_irq(lock)
#else
# define spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
# define read_unlock(lock) __raw_read_unlock(&(lock)->raw_lock)
# define write_unlock(lock) __raw_write_unlock(&(lock)->raw_lock)
# define spin_unlock_irq(lock) \
do { __raw_spin_unlock(&(lock)->raw_lock); local_irq_enable(); } while (0)
# define read_unlock_irq(lock) \