[GFS2] use the declaration of gfs2_dops in the header file instead

Signed-off-by: NDenis Cheng <crquan@gmail.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

fs/gfs2/ops_fstype.c

@@ -28,6 +28,7 @@
 #include "lm.h"
 #include "mount.h"
 #include "ops_fstype.h"
+#include "ops_dentry.h"
 #include "ops_super.h"
 #include "recovery.h"
 #include "rgrp.h"
@@ -38,8 +39,6 @@
 #define DO 0
 #define UNDO 1
 
-extern struct dentry_operations gfs2_dops;
-
 static struct gfs2_sbd *init_sbd(struct super_block *sb)
 {
 	struct gfs2_sbd *sdp;