From patchwork Tue Dec 15 00:20:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Begunkov X-Patchwork-Id: 344260 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AE95FC2BBD4 for ; Tue, 15 Dec 2020 00:25:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5E85522258 for ; Tue, 15 Dec 2020 00:25:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728368AbgLOAZB (ORCPT ); Mon, 14 Dec 2020 19:25:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53450 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727535AbgLOAYs (ORCPT ); Mon, 14 Dec 2020 19:24:48 -0500 Received: from mail-wr1-x443.google.com (mail-wr1-x443.google.com [IPv6:2a00:1450:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07F1DC0617A7; Mon, 14 Dec 2020 16:24:08 -0800 (PST) Received: by mail-wr1-x443.google.com with SMTP id a12so18140478wrv.8; Mon, 14 Dec 2020 16:24:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=jQVTvgGa1LjUWqvTxBIf73PGX5t0yWv/7jb/FOyHpnQ=; b=MNxOq+/uE7DIwyNRUYewGw+cHYV3pClHNKkFNyBIVdI3EmUW/iPsPfP7yyzvq8u6HW y+G5urnHOa4dHakH8fNwlven+K4tiRfbWXhhmxGgEeMzIgON/V/3KPvIIE1STFr4wlIj SgeoTLBn1XPnx5Gw54WO9Ail0Pbu+qn1ntWpDgf7sX2nl46zzOUPoASz3AKqbQTRe5C8 qjhO3fZhfFlR+QPZhkUFrJzZojsifXm8XUJO1MGsQth6ATu4tYHY/Ma1viQrwsp2EP4o 7pb0PcP510viQINAxb0x6SwFrTsMMbzg0xzT5YV55QJkl2tVrPkM8FYFuof/4cC/EixF gDtA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jQVTvgGa1LjUWqvTxBIf73PGX5t0yWv/7jb/FOyHpnQ=; b=J7JY5rXW+LgkCyM9vmy8ceYE1Ie5zjb1QzLInwkdkQ+4mDT1CaZvWxLwroq6RuI+a4 0fKrMddE6xUScoIbOKsAi/tPVR9D+R5n9gRNSavJCKmr0pXJ6Ui1d1Zx3bn5PEd0zx7A BVlcoB7J/vPV9VJaDBK4rB6hbY3++rFzlD3iXlBekc/LZBMMd8YrAAJSFf6KDxF83L7w VEFOzsOS6QhT2/VJCtRXU/YZH78GPViVz+axdSWlYey6S2hsZfHIsDb+Iogeuo1dwpKI ddzzZ8tlQXp4O9j3eFJlG0WXyiit/4PHCYGmVjpzHBJuazbvVuOVcKaliluycZTkCLkZ sv5A== X-Gm-Message-State: AOAM5315zvBDRXh8mizkM+XJoT+Go0B8je2Qh7SnW8L9wzO1FOgzGUR1 eP08cRZFgrI2xnY1e7gA+7jghzjQQ6OB0/ZV X-Google-Smtp-Source: ABdhPJzkeBXbuB0e70wPSfv0YNEY+IY3u+FsW+X1sRWABcHyKLngnn7Dx2/0Lsq9Kl4ceWUMiJY3iQ== X-Received: by 2002:adf:f590:: with SMTP id f16mr194470wro.40.1607991846606; Mon, 14 Dec 2020 16:24:06 -0800 (PST) Received: from localhost.localdomain ([85.255.232.163]) by smtp.gmail.com with ESMTPSA id b19sm5362012wmj.37.2020.12.14.16.24.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Dec 2020 16:24:06 -0800 (PST) From: Pavel Begunkov To: linux-block@vger.kernel.org Cc: Jens Axboe , Christoph Hellwig , Matthew Wilcox , Ming Lei , Johannes Weiner , Alexander Viro , "Darrick J . Wong" , "Martin K . Petersen" , Jonathan Corbet , linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, target-devel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH v1 3/6] bio: deduplicate adding a page into bio Date: Tue, 15 Dec 2020 00:20:22 +0000 Message-Id: <189cae47946fa49318f85678def738d358e8298b.1607976425.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Both bio_add_hw_page() mimics bio_add_page() and has a hand-coded version of appending a page into bio's bvec. DRY Signed-off-by: Pavel Begunkov Reviewed-by: Christoph Hellwig --- block/bio.c | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/block/bio.c b/block/bio.c index 1f2cc1fbe283..4a8f77bb3956 100644 --- a/block/bio.c +++ b/block/bio.c @@ -734,6 +734,22 @@ const char *bio_devname(struct bio *bio, char *buf) } EXPORT_SYMBOL(bio_devname); +static void bio_add_page_noaccount(struct bio *bio, struct page *page, + unsigned int len, unsigned int off) +{ + struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt]; + + WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); + WARN_ON_ONCE(bio_full(bio, len)); + + bv->bv_page = page; + bv->bv_offset = off; + bv->bv_len = len; + + bio->bi_iter.bi_size += len; + bio->bi_vcnt++; +} + static inline bool page_is_mergeable(const struct bio_vec *bv, struct page *page, unsigned int len, unsigned int off, bool *same_page) @@ -818,12 +834,7 @@ int bio_add_hw_page(struct request_queue *q, struct bio *bio, if (bio->bi_vcnt >= queue_max_segments(q)) return 0; - bvec = &bio->bi_io_vec[bio->bi_vcnt]; - bvec->bv_page = page; - bvec->bv_len = len; - bvec->bv_offset = offset; - bio->bi_vcnt++; - bio->bi_iter.bi_size += len; + bio_add_page_noaccount(bio, page, len, offset); return len; } @@ -903,18 +914,7 @@ EXPORT_SYMBOL_GPL(__bio_try_merge_page); void __bio_add_page(struct bio *bio, struct page *page, unsigned int len, unsigned int off) { - struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt]; - - WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); - WARN_ON_ONCE(bio_full(bio, len)); - - bv->bv_page = page; - bv->bv_offset = off; - bv->bv_len = len; - - bio->bi_iter.bi_size += len; - bio->bi_vcnt++; - + bio_add_page_noaccount(bio, page, len, off); if (!bio_flagged(bio, BIO_WORKINGSET) && unlikely(PageWorkingset(page))) bio_set_flag(bio, BIO_WORKINGSET); }