diff options
author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 11:24:53 +0400 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-04 02:27:04 +0400 |
commit | 4ea2176dfa714882e88180b474e4cbcd888b70af (patch) | |
tree | 7ff3810f6b8750c226234887bb3063d91e1d71c3 /kernel | |
parent | a8f24a3978c5f82419e1c90dc90460731204f46f (diff) | |
download | linux-4ea2176dfa714882e88180b474e4cbcd888b70af.tar.xz |
[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')
-rw-r--r-- | kernel/Makefile | 2 | ||||
-rw-r--r-- | kernel/rwsem.c | 42 |
2 files changed, 43 insertions, 1 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 3dd994eedc5c..df6ef3263699 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -8,7 +8,7 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \ signal.o sys.o kmod.o workqueue.o pid.o \ rcupdate.o extable.o params.o posix-timers.o \ kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \ - hrtimer.o + hrtimer.o rwsem.o obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-y += time/ diff --git a/kernel/rwsem.c b/kernel/rwsem.c index 790a99bb25aa..291ded556aa0 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 + + |