From: Kemeng Shi <shikemeng@huaweicloud.com>
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 [thread overview]
Message-ID: <20230209201116.579809-5-shikemeng@huaweicloud.com> (raw)
In-Reply-To: <20230209201116.579809-1-shikemeng@huaweicloud.com>
Bits in tag_mask will not be accessed after it's cleared. So we can remove
this unnecessary clear.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
---
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++;
--
2.30.0
next prev parent reply other threads:[~2023-02-09 12:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-09 20:11 [PATCH 0/7] A few bugfix and cleanup patches to blk-mq Kemeng Shi
2023-02-09 20:11 ` [PATCH 1/7] blk-mq: sync wake_batch update and users number change Kemeng Shi
2023-02-09 13:43 ` Jan Kara
2023-02-09 20:11 ` [PATCH 2/7] blk-mq: count changed hctx as active in blk_mq_get_tag Kemeng Shi
2023-02-09 13:55 ` Jan Kara
2023-02-09 20:11 ` [PATCH 3/7] blk-mq: remove wake_batch recalculation for reserved tags Kemeng Shi
2023-02-09 20:11 ` Kemeng Shi [this message]
2023-02-09 20:11 ` [PATCH 5/7] blk-mq: remove unnecessary "set->queue_depth == 0" check in blk_mq_alloc_set_map_and_rqs Kemeng Shi
2023-02-09 20:11 ` [PATCH 6/7] blk-mq: Remove unnecessary hctx check in function blk_mq_alloc_and_init_hctx Kemeng Shi
2023-02-09 20:11 ` [PATCH 7/7] blk-mq: remove stale comment of function called for iterated request Kemeng Shi
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