From patchwork Sat Dec 17 18:47:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Fabio M. De Francesco" X-Patchwork-Id: 34235 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:e747:0:0:0:0:0 with SMTP id c7csp1636163wrn; Sat, 17 Dec 2022 10:57:46 -0800 (PST) X-Google-Smtp-Source: AA0mqf7GoCPF83lI3V8qrQOvzrzHz8XhEdn83VUEOr4p3L8ju3eqZQABDoHwDIWnsHRM2dekQOHs X-Received: by 2002:a17:906:2993:b0:7c0:f7b0:95d3 with SMTP id x19-20020a170906299300b007c0f7b095d3mr28721378eje.36.1671303465903; Sat, 17 Dec 2022 10:57:45 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1671303465; cv=none; d=google.com; s=arc-20160816; b=XnmfDP2MtniHN4DlKkmgkSK9Ln+WU9VsgdF32f2hkYDYzFI651zYs1aYU6qpCQFYKc imWGTP/roJ8Rif6ve+0KGcz2amKUOwjcwtiks+jzvpraJvVCDjabRPPDjl8m/xXGkR0a JPTPIRApb5ugdaU1+jgohZPfVgmyDu+JhzDNKlznm4vuc+H1pmWUd6erXCOLrLCiLi5+ 0Oe4Udv/+AE9rml7/tPP5/wXa8KQs7SrENxSYOnTc5Gl1k+nBgIaEsfdEYJoxyEgdo8Q H1NEoQZvPtUg4LLm2zY3B1YYzUdtmNDVdpQYhfzynVqPxgVlXWhsMbd37rECt/s1eQri Gokw== 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 :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=5jghot3JZGfw4NoEk9T1OvZadmJ48FJEB71fkAQxUvE=; b=fkY1eSPGgu1BXduIPUqFWiRQT6fOsaibbiR+gn5sJCkgAeckJmfCNktelD8BX4DF2C ceKsRUnCSn7w65atSTQ9dqYAni6dumPs75jYT0QNQbJWQR7mZH0D7whGBywoE3x5PXSx 81AWlYp/EqTQsMHTFO231tK13CYJ4FCpejI0btXMZTErU1v+dLLsdYRKzzpNI6ukp+bV HyIKyyUeLVvGzGig0BV+Q1QlI5d+Om1LVTX1wciix2SR2Ss1fZMfdttTc01GLTjbHX+X r1HrwsozpOQviy4JBGsZVr+iEU0cJczfFCxjEzGGaHGi5tVdcV+wuhWGEcYA+/aex2Vh Sg7Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=WE0WzPGk; 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=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id vp4-20020a170907a48400b007a7f207a1b9si4501485ejc.664.2022.12.17.10.57.23; Sat, 17 Dec 2022 10:57:45 -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=@gmail.com header.s=20210112 header.b=WE0WzPGk; 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=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229978AbiLQSsN (ORCPT + 99 others); Sat, 17 Dec 2022 13:48:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229783AbiLQSsH (ORCPT ); Sat, 17 Dec 2022 13:48:07 -0500 Received: from mail-wm1-x333.google.com (mail-wm1-x333.google.com [IPv6:2a00:1450:4864:20::333]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA22BDFB4; Sat, 17 Dec 2022 10:48:05 -0800 (PST) Received: by mail-wm1-x333.google.com with SMTP id v124-20020a1cac82000000b003cf7a4ea2caso6206369wme.5; Sat, 17 Dec 2022 10:48:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=5jghot3JZGfw4NoEk9T1OvZadmJ48FJEB71fkAQxUvE=; b=WE0WzPGkqsj6zyGeajdPvYaf/k3hmevTcSGMxGArvTW9v5lOZPAr8Ozs1l+g2F8Zq7 /oZUmvpwC33JlKpraDe+0S9fVTOOUA1E+G3z55lzjwcvvA45Kgd+BqUBlPCGmf8Uto6X O5E0YpjaBlecDdg6iVx8CN49OxG/tvWDzbBOkjrzAOB7YukX7rs3W8RQk5QRbRii/Q41 Vs2Ph+qQEurOTUoN6Ky7VXrxVK0hyquoRvyAX/Fh+PCP/0H4E/3RcJ4Rl4zDR0x/Fk8/ wmZcin4livQl5IPm1NTCtMscYHA2uN6NiSoHn33Z0GQixJFrpx3JwGv5YsTGhoxz3AbM GeTA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5jghot3JZGfw4NoEk9T1OvZadmJ48FJEB71fkAQxUvE=; b=RQBz+Fzuxzqt9yT03PpxDq1RFAc4AacUoggpEZoxcGvv3yB72FLFK1G2ol8RsWJAiV M08DnnRrKA0sySST4rcrgq2HhG7DHVXDbGskh0RYGbQ39Ner5OX1JcOYvo27SifTEaUn 2YGD4fOywTZksK7naB2JPK7MZf9xZzpNopPnPfdetDcnLr82GRxOM1yiHQBmUP1wwmZf ylYykROMADhQ40OmbuX7rmbwHSamVE1fG6UXQHTt34KXp064X7ldp7TjqMj8AIm1fTmB 0uPQnHDbYG+9SpnXakdcnNa7JuixR+OJe8VzBdk88CPjmjgjm4qqmpHwaPl7/QG+JjbF sc8A== X-Gm-Message-State: ANoB5pmwv2wQafi851MUu6GXsHb5mWWoiC8BUOKC8JbyvROvP7R79M2f vExd3yisP0PJ7VA5SiHWq+6SxJ+RWfI= X-Received: by 2002:a05:600c:4e0e:b0:3cf:b73f:c061 with SMTP id b14-20020a05600c4e0e00b003cfb73fc061mr27304881wmq.16.1671302884427; Sat, 17 Dec 2022 10:48:04 -0800 (PST) Received: from localhost.localdomain (host-79-17-30-229.retail.telecomitalia.it. [79.17.30.229]) by smtp.gmail.com with ESMTPSA id 8-20020a05600c020800b003b4935f04a4sm7726062wmi.5.2022.12.17.10.48.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Dec 2022 10:48:03 -0800 (PST) From: "Fabio M. De Francesco" To: Evgeniy Dushistov , Al Viro , Ira Weiny , linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: "Fabio M. De Francesco" Subject: [PATCH v3 1/3] fs/ufs: Use the offset_in_page() helper Date: Sat, 17 Dec 2022 19:47:47 +0100 Message-Id: <20221217184749.968-2-fmdefrancesco@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221217184749.968-1-fmdefrancesco@gmail.com> References: <20221217184749.968-1-fmdefrancesco@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,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?1752488703110091352?= X-GMAIL-MSGID: =?utf-8?q?1752488703110091352?= Use the offset_in_page() helper because it is more suitable than doing explicit subtractions between pointers to directory entries and kernel virtual addresses of mapped pages. Cc: Ira Weiny Suggested-by: Al Viro Signed-off-by: Fabio M. De Francesco --- fs/ufs/dir.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c index 391efaf1d528..69f78583c9c1 100644 --- a/fs/ufs/dir.c +++ b/fs/ufs/dir.c @@ -87,8 +87,7 @@ void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de, struct page *page, struct inode *inode, bool update_times) { - loff_t pos = page_offset(page) + - (char *) de - (char *) page_address(page); + loff_t pos = page_offset(page) + offset_in_page(de); unsigned len = fs16_to_cpu(dir->i_sb, de->d_reclen); int err; @@ -371,8 +370,7 @@ int ufs_add_link(struct dentry *dentry, struct inode *inode) return -EINVAL; got_it: - pos = page_offset(page) + - (char*)de - (char*)page_address(page); + pos = page_offset(page) + offset_in_page(de); err = ufs_prepare_chunk(page, pos, rec_len); if (err) goto out_unlock; @@ -497,8 +495,8 @@ int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir, { struct super_block *sb = inode->i_sb; char *kaddr = page_address(page); - unsigned from = ((char*)dir - kaddr) & ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1); - unsigned to = ((char*)dir - kaddr) + fs16_to_cpu(sb, dir->d_reclen); + unsigned int from = offset_in_page(dir) & ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1); + unsigned int to = offset_in_page(dir) + fs16_to_cpu(sb, dir->d_reclen); loff_t pos; struct ufs_dir_entry *pde = NULL; struct ufs_dir_entry *de = (struct ufs_dir_entry *) (kaddr + from); @@ -522,7 +520,7 @@ int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir, de = ufs_next_entry(sb, de); } if (pde) - from = (char*)pde - (char*)page_address(page); + from = offset_in_page(pde); pos = page_offset(page) + from; lock_page(page);