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author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 00:24:53 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:04 -0700 |
commit | 4ea2176dfa714882e88180b474e4cbcd888b70af (patch) | |
tree | 7ff3810f6b8750c226234887bb3063d91e1d71c3 /kernel/rwsem.c | |
parent | a8f24a3978c5f82419e1c90dc90460731204f46f (diff) | |
download | kernel_samsung_tuna-4ea2176dfa714882e88180b474e4cbcd888b70af.zip kernel_samsung_tuna-4ea2176dfa714882e88180b474e4cbcd888b70af.tar.gz kernel_samsung_tuna-4ea2176dfa714882e88180b474e4cbcd888b70af.tar.bz2 |
[PATCH] lockdep: prove rwsem locking correctness
Use the lock validator framework to prove rwsem 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>
Diffstat (limited to 'kernel/rwsem.c')
-rw-r--r-- | kernel/rwsem.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/kernel/rwsem.c b/kernel/rwsem.c index 790a99b..291ded5 100644 --- a/kernel/rwsem.c +++ b/kernel/rwsem.c @@ -103,3 +103,45 @@ void downgrade_write(struct rw_semaphore *sem) } EXPORT_SYMBOL(downgrade_write); + +#ifdef CONFIG_DEBUG_LOCK_ALLOC + +void down_read_nested(struct rw_semaphore *sem, int subclass) +{ + might_sleep(); + rwsem_acquire_read(&sem->dep_map, subclass, 0, _RET_IP_); + + __down_read(sem); +} + +EXPORT_SYMBOL(down_read_nested); + +void down_read_non_owner(struct rw_semaphore *sem) +{ + might_sleep(); + + __down_read(sem); +} + +EXPORT_SYMBOL(down_read_non_owner); + +void down_write_nested(struct rw_semaphore *sem, int subclass) +{ + might_sleep(); + rwsem_acquire(&sem->dep_map, subclass, 0, _RET_IP_); + + __down_write_nested(sem, subclass); +} + +EXPORT_SYMBOL(down_write_nested); + +void up_read_non_owner(struct rw_semaphore *sem) +{ + __up_read(sem); +} + +EXPORT_SYMBOL(up_read_non_owner); + +#endif + + |