rem: return FS_CALL(vnode,fs_write)(vnode->mount->cookie, vnode->private_node, descriptor->cookie, pos, buffer, length);
add: return FS_CALL(vnode, write)(vnode->mount->cookie, vnode->private_node, descriptor->cookie, pos, buffer, length);
context: file_write(struct file_descriptor *descriptor, off_t pos, const void *buffer, size_t *length){	struct vnode *vnode = descriptor->vnode;	FUNCTION(("file_write: buf %p, pos %Ld, len %p\n", buffer, pos, length));	return FS_CALL(vnode,fs_write)(vnode->mount->cookie, vnode->private_node, descriptor->cookie, pos, buffer, length);}