vfs: nameidata_to_filp(): inline __dentry_open()

Copy __dentry_open() into nameidata_to_filp().
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/open.c

@@ -828,9 +828,25 @@ struct file *nameidata_to_filp(struct nameidata *nd)
 
 	/* Has the filesystem initialised the file for us? */
 	if (filp->f_path.dentry == NULL) {
+		struct file *res;
+
 		path_get(&nd->path);
-		filp = __dentry_open(nd->path.dentry, nd->path.mnt, filp,
-				     NULL, cred);
+		res = do_dentry_open(nd->path.dentry, nd->path.mnt,
+				     filp, NULL, cred);
+		if (!IS_ERR(res)) {
+			int error;
+
+			BUG_ON(res != filp);
+
+			error = open_check_o_direct(filp);
+			if (error) {
+				fput(filp);
+				filp = ERR_PTR(error);
+			}
+		} else {
+			put_filp(filp);
+			filp = res;
+		}
 	}
 	return filp;
 }