ocfs2: Silence false lockdep warnings

Create separate lockdep lock classes for system file's i_mutexes. They are
used to guard allocations and similar things and thus rank differently
than i_mutex of a regular file or directory.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

fs/ocfs2/journal.c

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 8b9ce2a..f31c7e8 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1244,7 +1244,7 @@
 
 	/* Skip bad inodes so that recovery can continue */
 	iter = ocfs2_iget(p->osb, ino,
-			  OCFS2_FI_FLAG_ORPHAN_RECOVERY);
+			  OCFS2_FI_FLAG_ORPHAN_RECOVERY, 0);
 	if (IS_ERR(iter))
 		return 0;