[XFS] Add lockdep support for XFS
SGI-PV: 963965
SGI-Modid: xfs-linux-melb:xfs-kern:28485a
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/fs/xfs/linux-2.6/mrlock.h b/fs/xfs/linux-2.6/mrlock.h
index af168a1..c110bb0 100644
--- a/fs/xfs/linux-2.6/mrlock.h
+++ b/fs/xfs/linux-2.6/mrlock.h
@@ -43,6 +43,18 @@
mrp->mr_writer = 1;
}
+static inline void mraccess_nested(mrlock_t *mrp, int subclass)
+{
+ down_read_nested(&mrp->mr_lock, subclass);
+}
+
+static inline void mrupdate_nested(mrlock_t *mrp, int subclass)
+{
+ down_write_nested(&mrp->mr_lock, subclass);
+ mrp->mr_writer = 1;
+}
+
+
static inline int mrtryaccess(mrlock_t *mrp)
{
return down_read_trylock(&mrp->mr_lock);