static void fuse_prepare_release(struct fuse_inode *fi, struct fuse_file *ff,
				 int flags, int opcode)
{
	struct fuse_conn *fc = ff->fm->fc;
	struct fuse_release_args *ra = ff->release_args;

	/* Inode is NULL on error path of fuse_create_open() */
	if (likely(fi)) {
		spin_lock(&fi->lock);
		list_del(&ff->write_entry);
		spin_unlock(&fi->lock);
	}
	spin_lock(&fc->lock);
	if (!RB_EMPTY_NODE(&ff->polled_node))
		rb_erase(&ff->polled_node, &fc->polled_files);
	spin_unlock(&fc->lock);

	wake_up_interruptible_all(&ff->poll_wait);

	ra->inarg.fh = ff->fh;
	ra->inarg.flags = flags;
	ra->args.in_numargs = 1;
	ra->args.in_args[0].size = sizeof(struct fuse_release_in);
	ra->args.in_args[0].value = &ra->inarg;
	ra->args.opcode = opcode;
	ra->args.nodeid = ff->nodeid;
	ra->args.force = true;
	ra->args.nocreds = true;
}
static void fuse_prepare_release(struct fuse_inode *fi, struct fuse_file *ff,
				 int flags, int opcode)
{
	struct fuse_conn *fc = ff->fm->fc;
	struct fuse_release_args *ra = ff->release_args;

	 
	if (likely(fi)) {
		spin_lock(&fi->lock);
		list_del(&ff->write_entry);
		spin_unlock(&fi->lock);
	}
	spin_lock(&fc->lock);
	if (!RB_EMPTY_NODE(&ff->polled_node))
		rb_erase(&ff->polled_node, &fc->polled_files);
	spin_unlock(&fc->lock);

	wake_up_interruptible_all(&ff->poll_wait);

	ra->inarg.fh = ff->fh;
	ra->inarg.flags = flags;
	ra->args.in_numargs = 1;
	ra->args.in_args[0].size = sizeof(struct fuse_release_in);
	ra->args.in_args[0].value = &ra->inarg;
	ra->args.opcode = opcode;
	ra->args.nodeid = ff->nodeid;
	ra->args.force = true;
	ra->args.nocreds = true;
}