diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index c134d10..820bf5ca 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -47,7 +47,7 @@
 	unsigned int afid;	/* authentication fid */
 	unsigned int rfdno;	/* read file descriptor number */
 	unsigned int wfdno;	/* write file descriptor number */
-
+	unsigned int cache;	/* cache mode */
 
 	char *name;		/* user name to mount as */
 	char *remotename;	/* name of remote hierarchy being mounted */
@@ -73,6 +73,13 @@
 	PROTO_FD,
 };
 
+/* possible values of ->cache */
+/* eventually support loose, tight, time, session, default always none */
+enum {
+	CACHE_NONE,		/* default */
+	CACHE_LOOSE,		/* no consistency */
+};
+
 extern struct dentry *v9fs_debugfs_root;
 
 int v9fs_session_init(struct v9fs_session_info *, const char *, char *);