Received: by 2002:a25:ef43:0:0:0:0:0 with SMTP id w3csp294589ybm; Thu, 28 May 2020 02:59:34 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx3pjyafo8ImVzhaMkj9q41O15DOYhnxhxyWBWuSP58vTAH5ZLofIUgYG9fPCoEKZR3IAtE X-Received: by 2002:a50:fd01:: with SMTP id i1mr2393164eds.32.1590659973970; Thu, 28 May 2020 02:59:33 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1590659973; cv=none; d=google.com; s=arc-20160816; b=oC8YG4fw4FPdXpml9es1km1UAuqLPkx/vp3rvWFj9LZbGDwx7s6va5jZdfs9wgkHeJ WoXdRG41DO3d1r05P7YgQPaSV9rpPwta6Oh36DxJfd43AW4BlmZ3JxpalP/C9kaFj53S Nfg4+vUva2WLwYbYX7GgINHwBoArJndTg1iH+XlRCbZvuVzwlhNT4BPLBPI4HvbdHhIM 172po4ehHo/AnixxtQgdMIASURzpCFP251Ny+4PF0xKQ3S6cFepDIgxf5nnb/p7WCNJM 5Z3aPUFl49t0MZ+eudR0otKhTljkB2TCpQ1cup4k9jjxT1AMqYnrRU6ZmyHIrepi3LR+ mbqQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=PdmQuxdVwBxh/Lw17j3u3VbvlIP0mJKPP2d2XTJSZnM=; b=iD4pOFdIJqY6olCWKzRBoSCfx/rqc9t2gmqxr2Q+22ypiuQDmU+Pf9mow7YEYHbWxg RULw4ufEx3e3RBH4T03seAE75c4qy8QpW6cnqishXavFHR8NTUbgvIvczifWsi7SpWp/ +LeLsgsKRO6QSaJvb3Qr3IPGU590BcDaepYFoYdvGgqWNIfv3rkaWuGyLUN5rujMfY+0 SGi6QBCT3dBSjo/zysIKQu148Okf5G3faZ9ax0h++ppoUP0AB2+HFT6xEoxNpxKLbL+/ UDsF6q9o5Kc1Xn6SL5glb9lp5M4N732fLD4gz82bZH9/qLomn52Ut6YCZ+yIltR1Rl79 s78A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2020-01-29 header.b=sU5FFmgp; 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=oracle.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id du3si4477019ejc.510.2020.05.28.02.59.10; Thu, 28 May 2020 02:59:33 -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=@oracle.com header.s=corp-2020-01-29 header.b=sU5FFmgp; 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=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387610AbgE1J5W (ORCPT + 99 others); Thu, 28 May 2020 05:57:22 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:58862 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387432AbgE1J5V (ORCPT ); Thu, 28 May 2020 05:57:21 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 04S9u2nJ123745; Thu, 28 May 2020 09:57:17 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2020-01-29; bh=PdmQuxdVwBxh/Lw17j3u3VbvlIP0mJKPP2d2XTJSZnM=; b=sU5FFmgpUPDK12cdmZ4NJyoBh8ZuGlG0QfQkk6esfrP3SvXj3ULfopuBnsZ1eCPNkEaR cT8JGfRNiMkrM3sC1Y4KmQxxsKWxFlJzq7zLQxlKoB/MXwRGWQ1lKzCdEb93zXYFAi6c wM52q29XzbSBxOAkzeQvqGI8DHo/nJLZurHYcwfx/70JMJqZkI3W3RS0zMOZ6t83l9HX Ubnz3LkM50h0T4qdKLcv+ISTp2jiNraz90DlnhbCkl4NToXh1dSafKynG0eMYAW042Ps Sj5szxXdiZZ7REissN4pAWBTYkazVlCaTckL5SDzmScbcjw20W/h17eB1jAp/W0sAjQ6 jQ== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2120.oracle.com with ESMTP id 318xbk44gt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 28 May 2020 09:57:17 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 04S9mu4D052688; Thu, 28 May 2020 09:57:17 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userp3030.oracle.com with ESMTP id 317ds282f4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 28 May 2020 09:57:17 +0000 Received: from abhmp0001.oracle.com (abhmp0001.oracle.com [141.146.116.7]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 04S9vGAL016319; Thu, 28 May 2020 09:57:16 GMT Received: from kadam (/41.57.98.10) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 28 May 2020 02:57:15 -0700 Date: Thu, 28 May 2020 12:57:03 +0300 From: Dan Carpenter To: "Zhang, Qiang" Cc: Markus Elfring , Tejun Heo , Lai Jiangshan , "linux-kernel@vger.kernel.org" , "kernel-janitors@vger.kernel.org" Subject: Re: =?utf-8?B?5Zue5aSNOiBbUEFUQ0ggdjU=?= =?utf-8?Q?=5D?= workqueue: Remove unnecessary kfree() call in rcu_free_wq() Message-ID: <20200528095703.GH30374@kadam> References: <20200527075715.36849-1-qiang.zhang@windriver.com> <284c7851-4e89-a00f-a2e6-aa8e2e1f3fce@web.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9634 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 phishscore=0 malwarescore=0 mlxlogscore=999 adultscore=0 suspectscore=0 bulkscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005280066 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9634 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 spamscore=0 mlxscore=0 lowpriorityscore=0 priorityscore=1501 phishscore=0 cotscore=-2147483648 suspectscore=0 bulkscore=0 clxscore=1011 impostorscore=0 malwarescore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005280066 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Guys, the patch is wrong. The kfree is harmless when this is called from destroy_workqueue() and required when it's called from pwq_unbound_release_workfn(). Lai Jiangshan already explained this already. Why are we still discussing this? regards, dan carpenter