From patchwork Wed Jan 18 15:26:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kent Overstreet X-Patchwork-Id: 45353 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2417981wrn; Wed, 18 Jan 2023 08:04:21 -0800 (PST) X-Google-Smtp-Source: AMrXdXtVp6ctOfKCmqHazq4t9TA3+w1vWQGF81cIO/aWLDEbHT1OdjO801fpk9RlIe/vTaBdn+JQ X-Received: by 2002:a05:6a21:33a8:b0:b6:9f9f:4b60 with SMTP id yy40-20020a056a2133a800b000b69f9f4b60mr10024020pzb.22.1674057861308; Wed, 18 Jan 2023 08:04:21 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674057861; cv=none; d=google.com; s=arc-20160816; b=OkpwYezLNEbKVNT3tc4DB/512Byl/MMwCFVFebHhhPZdVbuOwwgUoF+sfqhrpn2YKw Z0xjsGzSnuj5nsuRVwHPu+oBM9fM3/5y1tplkNdtp2iKJMRRUv+MNd3mZ2LRz1+NnuEH M+noHRZOGya0Cf9uPb2XphK8QUDnFY88u8WrROA28c7Cvqf2XMXkGfdo35OezSGzZ/kN 5p9ps898+SWYxCDE6qK0pVl41mqmYGlBC2c1XFseVcqHbAQWi1qpo2fyO9NY4O76UYRM qBCXLMMfuLHLq9ba9cZuC4Ut0goAKs6Cjj4Hq8Fw0ll0VsCPG3fZWzRs1pasf7KMvhlg flaw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=7IKaIZufY5EGrmY+2gZX2D6okxDALZBycWye212MQWU=; b=zxtz5slDmW6fbJ17pqZPSGRdLcCkUpmyWY2/nhzzV/t+z0AY5T0l2Ie33PjFY/kfv5 Br4+1uJWrpDa9kh5LaR4N2EAQM94d16E0h46J3e+edRb/lemFM85qu7EaLLbxpx57VzQ jm3/iS4zOLPJWFoVmM0csp90f81EMz35UfFinhDMpQMjYQH2jHan3l8X/86yMNz6NWoT rnoGrWbEh4qZj7eRafIg8Zw7VY+jBafL5t9uciqf/re6UV7MV+RfYl12RYUfSGI97iOO ZXGyd/VsMAQMWNVkzUmNZHJnmWiiWSY1EtME/cuW3SVQCJzeEgibMnLarjK9EmPxmDAz B58A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=KQ2JYehj; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id s139-20020a632c91000000b00458ae7b0a24si10669955pgs.208.2023.01.18.08.03.59; Wed, 18 Jan 2023 08:04:21 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=KQ2JYehj; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230085AbjARPzi (ORCPT + 99 others); Wed, 18 Jan 2023 10:55:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230392AbjARPyM (ORCPT ); Wed, 18 Jan 2023 10:54:12 -0500 X-Greylist: delayed 887 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Wed, 18 Jan 2023 07:51:05 PST Received: from out0.migadu.com (out0.migadu.com [94.23.1.103]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9665E5411B; Wed, 18 Jan 2023 07:51:04 -0800 (PST) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1674055579; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=7IKaIZufY5EGrmY+2gZX2D6okxDALZBycWye212MQWU=; b=KQ2JYehjt8IsHlBydNzu9XsmK6tK6Nv0G7DIYqxD3LikJK1w8OsI4ofRZVpBfF5Ou2H8iP I+nkFfGnZvOvk+MDkiGzNrGIMADZY52GfJ227Q1v2/lGahIOiN4I28zMGHS+4noJVeen8S chewX+VzQRWgyQzAvdYxwg9fcHO8KQ4= From: Kent Overstreet To: linux-kernel@vger.kernel.org Cc: Kent Overstreet , linux-aio@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 1/2] fs/aio: Use kmap_local() instead of kmap() Date: Wed, 18 Jan 2023 10:26:02 -0500 Message-Id: <20230118152603.28301-1-kent.overstreet@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755376895792168186?= X-GMAIL-MSGID: =?utf-8?q?1755376895792168186?= Originally, we used kmap() instead of kmap_atomic() for reading events out of the completion ringbuffer because we're using copy_to_user(), which can fault. Now that kmap_local() is a thing, use that instead. Signed-off-by: Kent Overstreet Cc: Benjamin LaHaise