[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>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/gfs2/ops_vm.h b/fs/gfs2/ops_vm.h
index d5ba4b9c50fd..4ae8f43ed5e3 100644
--- a/fs/gfs2/ops_vm.h
+++ b/fs/gfs2/ops_vm.h
@@ -10,6 +10,8 @@
 #ifndef __OPS_VM_DOT_H__
 #define __OPS_VM_DOT_H__
 
+#include <linux/mm.h>
+
 extern struct vm_operations_struct gfs2_vm_ops_private;
 extern struct vm_operations_struct gfs2_vm_ops_sharewrite;