Received: by 2002:a05:6a10:5bc5:0:0:0:0 with SMTP id os5csp3543284pxb; Wed, 13 Oct 2021 08:06:26 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwPgs1RgnHpG1azeRRnO/nqClmjZ8N2d94ee+oFu2dF8Rq4dHOOZg1BvF9/dYmRa8BBhgzc X-Received: by 2002:aa7:9099:0:b0:44c:a3b5:ca52 with SMTP id i25-20020aa79099000000b0044ca3b5ca52mr37957209pfa.85.1634137586576; Wed, 13 Oct 2021 08:06:26 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1634137586; cv=none; d=google.com; s=arc-20160816; b=0J92lTl6bwHRzuKyxZZMxH7x/K8MSP6HTEpcnC2h62n6dfO/RzbYxMd82IrelSOPbr ZIZ/W3BUiDXqeEIBzTYDwotUGUU5TEGSGtfDD6CxJ584jCqPaDyI6U/Cb1CktLVeJsBF NoxzInXwBx99XfZRgzgmbg9mkSBmcBGexT6w4K9bLvoF/W5VWOlKKa+W4Bfo5JdLWp8F z4elssuRHxCxLxo5aTGZ3GRx5tsoJ3MlL6a3aloRzazI6a9z60ZE4fB5Xf2s/p7FUYUR FGZcakg4dh4YbNltguZ1mxcGt2zIvtXv0an4bzRwPxRDGI0oOc6GL/LcAnOGoWzgE65N J0Zw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=95f4kxLirbyrmqsYOBI/BSyr4QzFFSsCviL4aE83Ymg=; b=vD5oAh8KFenDRfii1A7TMQ/rHjaC4b/eKODYRQkTV+n/nPPTLny0M4++mnKtSPUhL9 JBtrFF8tlhawgWZGmcuPhskJT5j6gYJLB++Pb6pKjrfvhjwUrpQLXej7034cto7T131f 1sYxEWbAvlcXaICLoVitUW8uKaWXU0iHVPuyid85ZZsjvD/rW4G3BHRch88+WaAmJu8W 18ChbgTZ7ibDwAL2nKd8TMVrhVawcLayO4Q7veYEQqKWtMOKWHAQ6ygAuYhVqvChuR6S 8EDBh/X2OYfagYRdt8DuIcB101ZphztReqi4pgtenMKeHQxH9ZF4YfiM60LWUTyLspuY SK2A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=QMTmOAge; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id u10si17406281pfl.185.2021.10.13.08.06.05; Wed, 13 Oct 2021 08:06:26 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=QMTmOAge; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236309AbhJMPGW (ORCPT + 99 others); Wed, 13 Oct 2021 11:06:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:59934 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233969AbhJMPGV (ORCPT ); Wed, 13 Oct 2021 11:06:21 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B19E360F21; Wed, 13 Oct 2021 15:04:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1634137458; bh=OrypIYAhYXa9wGUSvO8g91htORfmmNplHozAJSPJRq8=; h=From:To:Cc:Subject:Date:In-Reply-To:From; b=QMTmOAgehbBmBkuxpLwRuJQCocj1XYq90veQBVwSShzLDXMHz/dxQ6vXXb2+lMe1b So1xk0b70W/AwWB/m0LLU+chUlBtQJ+agLP8TMyBih4dB69CvJKZZi9pwiEWfyNg5p U/LZBsApH5FivMO8AkykYNRpvyHBq9Fok4JzZuTB5rL+6CSd/ZGCyw5ZtfWHzAtL6G ckb9SAwdOhrtEc2h4ac5LqjOHbbmIqK31jdb58wvKtdsRWZiW187DIGN7vEVz4cfVN HL42BEYQWOSA0NamQXYv7cS4kB7jg7fhp8Mj8KSYeNt2DnjmaV2mxxMn7dDCr5G2ga qx0XFsdU0HCUQ== From: SeongJae Park To: Rongwei Wang Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, sj@kernel.org, akpm@linux-foundation.org Subject: Re: [PATCH] mm/damon/dbgfs: remove unnecessary variables Date: Wed, 13 Oct 2021 15:04:13 +0000 Message-Id: <20211013150413.23027-1-sj@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211013130901.1017-1-rongwei.wang@linux.alibaba.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rongwei, Thank you for this patch! Looks good to me overall. I left a couple of nitpicks below, though. On Wed, 13 Oct 2021 21:09:01 +0800 Rongwei Wang wrote: [...] > @@ -352,7 +350,7 @@ static ssize_t dbgfs_target_ids_write(struct file *file, > > nrs = kbuf; > > - targets = str_to_target_ids(nrs, ret, &nr_targets); > + targets = str_to_target_ids(nrs, count, &nr_targets); > if (!targets) { > ret = -ENOMEM; > goto out; > @@ -378,12 +376,12 @@ static ssize_t dbgfs_target_ids_write(struct file *file, > goto unlock_out; > } > > - err = damon_set_targets(ctx, targets, nr_targets); > - if (err) { > + ret = damon_set_targets(ctx, targets, nr_targets); > + if (ret < 0) { I'd prefer 'if (ret) {', to be consistent with other part. > if (targetid_is_pid(ctx)) > dbgfs_put_pids(targets, nr_targets); > - ret = err; > - } > + } else > + ret = count; I'd prefer this to have braces: https://docs.kernel.org/process/coding-style.html#placing-braces-and-spaces > > unlock_out: > mutex_unlock(&ctx->kdamond_lock); > @@ -548,8 +546,7 @@ static ssize_t dbgfs_mk_context_write(struct file *file, [...] Thanks, SJ