don't open-code file_inode()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 350a2c8..6e2771c 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -52,7 +52,7 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
 		   arg |= O_NONBLOCK;
 
 	/* Pipe packetized mode is controlled by O_DIRECT flag */
-	if (!S_ISFIFO(filp->f_inode->i_mode) && (arg & O_DIRECT)) {
+	if (!S_ISFIFO(inode->i_mode) && (arg & O_DIRECT)) {
 		if (!filp->f_mapping || !filp->f_mapping->a_ops ||
 			!filp->f_mapping->a_ops->direct_IO)
 				return -EINVAL;