X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=kernel%2Frwsem.c;h=291ded556aa034fffb7bf7c25799e9d7bb95eaf2;hb=428929a234d2c4b8a6d0145d0dcf687fcfa27325;hp=790a99bb25aae8c92fa3b5022796021069ba91ef;hpb=c4e05116a2c4d8187127dbf77ab790aa57a47388;p=powerpc.git

diff --git a/kernel/rwsem.c b/kernel/rwsem.c
index 790a99bb25..291ded556a 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
+
+