[CIFS]  add local struct inode pointer to cifs_setattr

Clean up cifs_setattr a bit by adding a local inode pointer, and
changing all of the direntry->d_inode references to it. This also adds a
bit of micro-optimization. d_inode shouldn't change over the life of
this function, so we only need to dereference it once.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 6b520aa..9650508 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1339,7 +1339,7 @@
 			 memcmp(&ses->server->addr.sockAddr6.sin6_addr,
 				target_ip6_addr, sizeof(*target_ip6_addr)))
 				continue;
-		/* BB lock server and tcp session and increment use count here?? */
+		/* BB lock server and tcp session; increment use count here?? */
 
 		/* found a match on the TCP session */
 		*psrvTcp = ses->server;