From patchwork Thu Feb 9 20:11:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kemeng Shi X-Patchwork-Id: 13134454 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B5DDC636D3 for ; Thu, 9 Feb 2023 12:11:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230266AbjBIMLZ (ORCPT ); Thu, 9 Feb 2023 07:11:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229646AbjBIMLM (ORCPT ); Thu, 9 Feb 2023 07:11:12 -0500 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 905EF40FE; Thu, 9 Feb 2023 04:09:21 -0800 (PST) Received: from mail02.huawei.com (unknown [172.30.67.169]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4PCFz04Pxbz4f3jZX; Thu, 9 Feb 2023 20:09:16 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.124.27]) by APP4 (Coremail) with SMTP id gCh0CgAHvrFr4uRj4rAuDQ--.53349S6; Thu, 09 Feb 2023 20:09:18 +0800 (CST) From: Kemeng Shi To: axboe@kernel.dk, hch@lst.de, jack@suse.cz Cc: andriy.shevchenko@linux.intel.com, qiulaibin@huawei.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/7] blk-mq: remove unnecessary bit clear in __blk_mq_alloc_requests_batch Date: Fri, 10 Feb 2023 04:11:13 +0800 Message-Id: <20230209201116.579809-5-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20230209201116.579809-1-shikemeng@huaweicloud.com> References: <20230209201116.579809-1-shikemeng@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: gCh0CgAHvrFr4uRj4rAuDQ--.53349S6 X-Coremail-Antispam: 1UD129KBjvdXoW7XrWkZrWrurWrWFy8tw13urg_yoWxArX_W3 Wjkr1xZFZ8CF4fCrs0ka4rtr4jk395Ary2ka4kKrZIva1xJFn3ArsxWr4Ykwsxuay7C34r Gw1UXr18JF1ktjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbSxYFVCjjxCrM7AC8VAFwI0_Wr0E3s1l1xkIjI8I6I8E6xAIw20E Y4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l87I20VAvwVAaII0Ic2I_JFv_Gryl82 xGYIkIc2x26280x7IE14v26r126s0DM28IrcIa0xkI8VCY1x0267AKxVW5JVCq3wA2ocxC 64kIII0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26F1j6w1UM2 8EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVW0oVCq 3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8w Aqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE 14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwCF04k20xvY0x 0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E 7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcV C0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjxUIL05UUUUU X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Bits in tag_mask will not be accessed after it's cleared. So we can remove this unnecessary clear. Signed-off-by: Kemeng Shi --- block/blk-mq.c | 1 - 1 file changed, 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 89b4dd81ae17..6014d9b5e296 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -456,7 +456,6 @@ __blk_mq_alloc_requests_batch(struct blk_mq_alloc_data *data, continue; tag = tag_offset + i; prefetch(tags->static_rqs[tag]); - tag_mask &= ~(1UL << i); rq = blk_mq_rq_ctx_init(data, tags, tag, alloc_time_ns); rq_list_add(data->cached_rq, rq); nr++;