fs/9p: fix type mismatch in file cache mode helper

There were two flags (s_flags and s_cache) which had incorrect signed
type in the parameters of the file cache mode helper function.

Cc: stable@vger.kernel.org
Fixes: 1543b4c5 ("fs/9p: remove writeback fid and fix per-file modes")
Reviewed-by: Dominique Martinet <asmadeus@codewreck.org>
Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>

fs/9p/fid.h

@@ -46,8 +46,8 @@ static inline struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
  * NOTE: these are set after open so only reflect 9p client not
  * underlying file system on server.
  */
-static inline void v9fs_fid_add_modes(struct p9_fid *fid, int s_flags,
-	int s_cache, unsigned int f_flags)
+static inline void v9fs_fid_add_modes(struct p9_fid *fid, unsigned int s_flags,
+	unsigned int s_cache, unsigned int f_flags)
 {
 	if (fid->qid.type != P9_QTFILE)
 		return;