new helper: done_path_create()

releases what needs to be released after {kern,user}_path_create()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/powerpc/platforms/cell/spufs/syscalls.c

@@ -70,9 +70,7 @@ static long do_spu_create(const char __user *pathname, unsigned int flags,
 	ret = PTR_ERR(dentry);
 	if (!IS_ERR(dentry)) {
 		ret = spufs_create(&path, dentry, flags, mode, neighbor);
-		mutex_unlock(&path.dentry->d_inode->i_mutex);
-		dput(dentry);
-		path_put(&path);
+		done_path_create(&path, dentry);
 	}
 
 	return ret;