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author | 2006-07-03 00:24:53 -0700 | |
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committer | 2006-07-03 15:27:04 -0700 | |
commit | 4ea2176dfa714882e88180b474e4cbcd888b70af (patch) | |
tree | 7ff3810f6b8750c226234887bb3063d91e1d71c3 /lib/rwsem.c | |
parent | [PATCH] lockdep: procfs (diff) | |
download | linux-4ea2176dfa714882e88180b474e4cbcd888b70af.tar.gz linux-4ea2176dfa714882e88180b474e4cbcd888b70af.tar.bz2 linux-4ea2176dfa714882e88180b474e4cbcd888b70af.zip |
[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 'lib/rwsem.c')
-rw-r--r-- | lib/rwsem.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/rwsem.c b/lib/rwsem.c index bae597284889..b322421c2969 100644 --- a/lib/rwsem.c +++ b/lib/rwsem.c @@ -8,6 +8,26 @@ #include <linux/init.h> #include <linux/module.h> +/* + * Initialize an rwsem: + */ +void __init_rwsem(struct rw_semaphore *sem, const char *name, + struct lock_class_key *key) +{ +#ifdef CONFIG_DEBUG_LOCK_ALLOC + /* + * Make sure we are not reinitializing a held semaphore: + */ + debug_check_no_locks_freed((void *)sem, sizeof(*sem)); + lockdep_init_map(&sem->dep_map, name, key); +#endif + sem->count = RWSEM_UNLOCKED_VALUE; + spin_lock_init(&sem->wait_lock); + INIT_LIST_HEAD(&sem->wait_list); +} + +EXPORT_SYMBOL(__init_rwsem); + struct rwsem_waiter { struct list_head list; struct task_struct *task; |