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[2620:137:e000::1:20]) by mx.google.com with ESMTP id qw15-20020a1709066a0f00b00778adc11b23si7069106ejc.126.2022.09.12.02.48.58; Mon, 12 Sep 2022 02:49:23 -0700 (PDT) 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=@kernel.org header.s=k20201202 header.b=JW87ZC2u; 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=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229569AbiILJhh (ORCPT + 99 others); Mon, 12 Sep 2022 05:37:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229691AbiILJhf (ORCPT ); Mon, 12 Sep 2022 05:37:35 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1370133375 for ; Mon, 12 Sep 2022 02:37:35 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A2D4061165 for ; Mon, 12 Sep 2022 09:37:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA055C433D6; Mon, 12 Sep 2022 09:37:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1662975454; bh=RfElTGrIzepVBlXKvZQanWRb9Oy61jya/t8G4QYxjFc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=JW87ZC2uS0wan2k4C7RJ03kZs4WErxiO50f211CKh5AqIEZyZaXkODwSEY05/eHd8 y0kVfXQKoeX+Rk7+Wj6i+ZMJjAcnqbcmAQjy1elVvUfu5g49UZ2IdY2AuYB/nceeXb eihaEyLTIu7MMWe1plq1PN0IFRC9gqCPnEu6s2NDAbMQ72kztb4CUKwvGkVOqNwAE/ zPWZkrIApheJW0vYi9/tY5vu3PZ3mqXpQrquAOKxqhhnARoWENrUIJogc+c3HqmAcQ BlDXTsaxFFISAVxrsSAdDjsNuX08dGTTBQ4IQMFSWwWlVFrypfOcbjeRX2JXHIAOhg Y2/Qg5z6fzzMQ== Date: Mon, 12 Sep 2022 18:37:30 +0900 From: Masami Hiramatsu (Google) To: Yang Yingliang Cc: , , , , Subject: Re: [PATCH -next 2/3] fail_function: refctor code of checking return value of register_kprobe() Message-Id: <20220912183730.5890cbbc5c062145c07a577a@kernel.org> In-Reply-To: <20220826073337.2085798-2-yangyingliang@huawei.com> References: <20220826073337.2085798-1-yangyingliang@huawei.com> <20220826073337.2085798-2-yangyingliang@huawei.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-9.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A, RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE 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 On Fri, 26 Aug 2022 15:33:36 +0800 Yang Yingliang wrote: > Refactor the error handling of register_kprobe() to improve readability. > No functional change. > > Signed-off-by: Yang Yingliang OK, but in this case, could you fold [2/3] and [3/3], because [3/3] can not be applied without this change. Thank you, > --- > kernel/fail_function.c | 11 +++++------ > 1 file changed, 5 insertions(+), 6 deletions(-) > > diff --git a/kernel/fail_function.c b/kernel/fail_function.c > index 03643e33e4c3..893e8f9a9118 100644 > --- a/kernel/fail_function.c > +++ b/kernel/fail_function.c > @@ -294,14 +294,13 @@ static ssize_t fei_write(struct file *file, const char __user *buffer, > } > > ret = register_kprobe(&attr->kp); > - if (!ret) > - fei_debugfs_add_attr(attr); > - if (ret < 0) > + if (ret) { > fei_attr_remove(attr); > - else { > - list_add_tail(&attr->list, &fei_attr_list); > - ret = count; > + goto out; > } > + fei_debugfs_add_attr(attr); > + list_add_tail(&attr->list, &fei_attr_list); > + ret = count; > out: > mutex_unlock(&fei_lock); > kfree(buf); > -- > 2.25.1 > -- Masami Hiramatsu (Google)