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authorIngo Molnar <mingo@elte.hu>2006-07-03 00:24:53 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-03 15:27:04 -0700
commit4ea2176dfa714882e88180b474e4cbcd888b70af (patch)
tree7ff3810f6b8750c226234887bb3063d91e1d71c3 /kernel/rwsem.c
parenta8f24a3978c5f82419e1c90dc90460731204f46f (diff)
downloadlinux-4ea2176dfa714882e88180b474e4cbcd888b70af.tar.gz
[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.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/kernel/rwsem.c b/kernel/rwsem.c
index 790a99bb25a..291ded556aa 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
+
+