From patchwork Tue Jun 15 13:24:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 460593 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, 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 D782BC48BDF for ; Tue, 15 Jun 2021 13:33:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C5D02601FC for ; Tue, 15 Jun 2021 13:33:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231203AbhFONf6 (ORCPT ); Tue, 15 Jun 2021 09:35:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230364AbhFONfg (ORCPT ); Tue, 15 Jun 2021 09:35:36 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC565C0613A4; Tue, 15 Jun 2021 06:33:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=1vl+lJtrWoiUzzKH0COLUmHTJyPccdOEl/SXPdFbHq8=; b=orcVM4ZS+23ndu19ILV+oG8Kdb EYq30bY5COpSe8j73G1ZSpdxCnZvGUug6zi+n3PtNKTIYr2gdrB6nrERB3vHdIIR4hPOT/UpTCyWs AYodO6/zr9y0OT7KoRpqlRoey1MBbGiUTgoxOd/kcm4TRjkQ8E3XYxEkGCrC8InktD++/3VespVyQ FAP7MeVYaSA+NqHbe0Hkisx+6r4BLNLdkNjC0eQtKEFztNzuWuVCAheweEjtcFUDpKAbuCLRmg4/G EVnQKf6DqMMaY9iFPuJi82thdu+6gkEtdThFuqtrkl3pXuuSly/nPtwkQFcg10SnbFD7sIkGMm4qc 1ysBDTTA==; Received: from [2001:4bb8:19b:fdce:9045:1e63:20f0:ca9] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1lt9Ae-006obD-98; Tue, 15 Jun 2021 13:32:08 +0000 From: Christoph Hellwig To: Jens Axboe , Thomas Gleixner Cc: Thomas Bogendoerfer , Geoff Levand , Ilya Dryomov , Dongsheng Yang , Mike Snitzer , "James E.J. Bottomley" , Ira Weiny , dm-devel@redhat.com, linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, ceph-devel@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH 18/18] block: use bvec_kmap_local in bio_integrity_process Date: Tue, 15 Jun 2021 15:24:56 +0200 Message-Id: <20210615132456.753241-19-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210615132456.753241-1-hch@lst.de> References: <20210615132456.753241-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Using local kmaps slightly reduces the chances to stray writes, and the bvec interface cleans up the code a little bit. Signed-off-by: Christoph Hellwig --- block/bio-integrity.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/block/bio-integrity.c b/block/bio-integrity.c index 4b4eb8964a6f..8f54d49dc500 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -172,18 +172,16 @@ static blk_status_t bio_integrity_process(struct bio *bio, iter.prot_buf = prot_buf; __bio_for_each_segment(bv, bio, bviter, *proc_iter) { - void *kaddr = kmap_atomic(bv.bv_page); + void *kaddr = bvec_kmap_local(&bv); - iter.data_buf = kaddr + bv.bv_offset; + iter.data_buf = kaddr; iter.data_size = bv.bv_len; - ret = proc_fn(&iter); - if (ret) { - kunmap_atomic(kaddr); - return ret; - } + kunmap_local(kaddr); + + if (ret) + break; - kunmap_atomic(kaddr); } return ret; }