[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/incore.h b/fs/gfs2/incore.h
index 407afd1..225924c 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -10,6 +10,8 @@
#ifndef __INCORE_DOT_H__
#define __INCORE_DOT_H__
+#include <linux/fs.h>
+
#define DIO_FORCE 0x00000001
#define DIO_CLEAN 0x00000002
#define DIO_DIRTY 0x00000004
