[GFS2] Make headers compile on their own
As per Jan Engelhardt's comments, this should make all the headers
compile on their own by including and/or declaring structures
early.
Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/sys.h b/fs/gfs2/sys.h
index f8c01b5..1ca8cda 100644
--- a/fs/gfs2/sys.h
+++ b/fs/gfs2/sys.h
@@ -10,6 +10,9 @@
#ifndef __SYS_DOT_H__
#define __SYS_DOT_H__
+#include <linux/spinlock.h>
+struct gfs2_sbd;
+
/* Allow args to be passed to GFS2 when using an initial ram disk */
extern char *gfs2_sys_margs;
extern spinlock_t gfs2_sys_margs_lock;