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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 713C4C43334 for ; Wed, 6 Jul 2022 07:04:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Q99xwmZ516+YqR7K1z4qPxcfNQ29PzHNUl8eoY+y9Tc=; b=rQGOZbQzVOX8pcGM0CPVItYGeu 4oGMNXiJLpNrBuyxV5Z60N2hQtqgAD0lmUc635iSZ/pZgJ6LFn8hKXI/mkBXolOwSTIAXAjW0W2BL wOdxc7cn6fVuKdZeoA4jp03ZWVTt6jbdP1TtfNrFU8Jtt1QX4TlgbQIQ/1xA4fzFZahCygLcrtqOZ MKDFAg9FuHE+9N3nte1sPNqa5CWv3+cZsCQGGQgDmAGos7KmkG33aFy+uuxqUoPrxzBeN+hI6aF+V sqwhL4GjWJAhohxzkFDypcjNYuz5FkVveyr8ywVN6PDUe1sOQSxTyS6wwilAQga1VdAtpGiqSMVpG 1jCifZeQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8z51-006v1M-HQ; Wed, 06 Jul 2022 07:04:11 +0000 Received: from [2001:4bb8:189:3c4a:f22c:c36a:4e84:c723] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1o8z4t-006uty-J4; Wed, 06 Jul 2022 07:04:03 +0000 From: Christoph Hellwig To: Jens Axboe , Damien Le Moal Cc: dm-devel@redhat.com, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, Chaitanya Kulkarni , Johannes Thumshirn Subject: [PATCH 04/16] block: simplify blk_mq_plug Date: Wed, 6 Jul 2022 09:03:38 +0200 Message-Id: <20220706070350.1703384-5-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220706070350.1703384-1-hch@lst.de> References: <20220706070350.1703384-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Drop the unused q argument, and invert the check to move the exception into a branch and the regular path as the normal return. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Reviewed-by: Damien Le Moal Reviewed-by: Johannes Thumshirn --- block/blk-core.c | 2 +- block/blk-merge.c | 2 +- block/blk-mq.c | 2 +- block/blk-mq.h | 18 ++++++++---------- 4 files changed, 11 insertions(+), 13 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 6bcca0b686de4..bc16e9bae2dc4 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -719,7 +719,7 @@ void submit_bio_noacct(struct bio *bio) might_sleep(); - plug = blk_mq_plug(q, bio); + plug = blk_mq_plug(bio); if (plug && plug->nowait) bio->bi_opf |= REQ_NOWAIT; diff --git a/block/blk-merge.c b/block/blk-merge.c index 0f5f42ebd0bb0..5abf5aa5a5f0e 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -1051,7 +1051,7 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio, struct blk_plug *plug; struct request *rq; - plug = blk_mq_plug(q, bio); + plug = blk_mq_plug(bio); if (!plug || rq_list_empty(plug->mq_list)) return false; diff --git a/block/blk-mq.c b/block/blk-mq.c index 15c7c5c4ad222..dc714dff73001 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2804,7 +2804,7 @@ static void bio_set_ioprio(struct bio *bio) void blk_mq_submit_bio(struct bio *bio) { struct request_queue *q = bdev_get_queue(bio->bi_bdev); - struct blk_plug *plug = blk_mq_plug(q, bio); + struct blk_plug *plug = blk_mq_plug(bio); const int is_sync = op_is_sync(bio->bi_opf); struct request *rq; unsigned int nr_segs = 1; diff --git a/block/blk-mq.h b/block/blk-mq.h index 31d75a83a562d..e694ec67d646a 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -294,7 +294,6 @@ static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap) /* * blk_mq_plug() - Get caller context plug - * @q: request queue * @bio : the bio being submitted by the caller context * * Plugging, by design, may delay the insertion of BIOs into the elevator in @@ -305,23 +304,22 @@ static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap) * order. While this is not a problem with regular block devices, this ordering * change can cause write BIO failures with zoned block devices as these * require sequential write patterns to zones. Prevent this from happening by - * ignoring the plug state of a BIO issuing context if the target request queue - * is for a zoned block device and the BIO to plug is a write operation. + * ignoring the plug state of a BIO issuing context if it is for a zoned block + * device and the BIO to plug is a write operation. * * Return current->plug if the bio can be plugged and NULL otherwise */ -static inline struct blk_plug *blk_mq_plug(struct request_queue *q, - struct bio *bio) +static inline struct blk_plug *blk_mq_plug( struct bio *bio) { + /* Zoned block device write operation case: do not plug the BIO */ + if (bdev_is_zoned(bio->bi_bdev) && op_is_write(bio_op(bio))) + return NULL; + /* * For regular block devices or read operations, use the context plug * which may be NULL if blk_start_plug() was not executed. */ - if (!bdev_is_zoned(bio->bi_bdev) || !op_is_write(bio_op(bio))) - return current->plug; - - /* Zoned block device write operation case: do not plug the BIO */ - return NULL; + return current->plug; } /* Free all requests on the list */ -- 2.30.2