From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61647C433EF for ; Fri, 29 Oct 2021 12:22:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4098761166 for ; Fri, 29 Oct 2021 12:22:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230273AbhJ2MZR (ORCPT ); Fri, 29 Oct 2021 08:25:17 -0400 Received: from out30-130.freemail.mail.aliyun.com ([115.124.30.130]:50064 "EHLO out30-130.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231519AbhJ2MZP (ORCPT ); Fri, 29 Oct 2021 08:25:15 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04357;MF=haoxu@linux.alibaba.com;NM=1;PH=DS;RN=4;SR=0;TI=SMTPD_---0Uu9pzWg_1635510157; Received: from e18g09479.et15sqa.tbsite.net(mailfrom:haoxu@linux.alibaba.com fp:SMTPD_---0Uu9pzWg_1635510157) by smtp.aliyun-inc.com(127.0.0.1); Fri, 29 Oct 2021 20:22:45 +0800 From: Hao Xu To: Jens Axboe Cc: io-uring@vger.kernel.org, Pavel Begunkov , Joseph Qi Subject: [PATCH 1/6] io-wq: add helper to merge two wq_lists Date: Fri, 29 Oct 2021 20:22:32 +0800 Message-Id: <20211029122237.164312-2-haoxu@linux.alibaba.com> X-Mailer: git-send-email 2.24.4 In-Reply-To: <20211029122237.164312-1-haoxu@linux.alibaba.com> References: <20211029122237.164312-1-haoxu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org add a helper to merge two wq_lists, it will be useful in the next patches. Signed-off-by: Hao Xu --- fs/io-wq.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/fs/io-wq.h b/fs/io-wq.h index 41bf37674a49..a7b0b505db9d 100644 --- a/fs/io-wq.h +++ b/fs/io-wq.h @@ -52,6 +52,27 @@ static inline void wq_list_add_after(struct io_wq_work_node *node, list->last = node; } +/** + * wq_list_merge - merge the second list to the first one. + * @list0: the first list + * @list1: the second list + * Return list0 if list1 is NULL, and vice versa. + * Otherwise after merge, list0 contains the merged list. + */ +static inline struct io_wq_work_list *wq_list_merge(struct io_wq_work_list *list0, + struct io_wq_work_list *list1) +{ + if (!list1 || !list1->first) + return list0; + + if (!list0 || !list0->first) + return list1; + + list0->last->next = list1->first; + list0->last = list1->last; + return list0; +} + static inline void wq_list_add_tail(struct io_wq_work_node *node, struct io_wq_work_list *list) { -- 2.24.4