From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A3F3C433E0 for ; Wed, 3 Feb 2021 11:41:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1D27964F6A for ; Wed, 3 Feb 2021 11:41:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234270AbhBCLk5 (ORCPT ); Wed, 3 Feb 2021 06:40:57 -0500 Received: from bilbo.ozlabs.org ([203.11.71.1]:46515 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234303AbhBCLks (ORCPT ); Wed, 3 Feb 2021 06:40:48 -0500 Received: by ozlabs.org (Postfix, from userid 1034) id 4DW0903CHVz9tkZ; Wed, 3 Feb 2021 22:40:03 +1100 (AEDT) From: Michael Ellerman To: mpe@ellerman.id.au, Qian Cai Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, paulus@samba.org, aik@ozlabs.ru, paulmck@kernel.org In-Reply-To: <20200510051347.1906-1-cai@lca.pw> References: <20200510051347.1906-1-cai@lca.pw> Subject: Re: [PATCH] powerpc/powernv/pci: fix a RCU-list lock Message-Id: <161235200863.1516112.12206707948646314806.b4-ty@ellerman.id.au> Date: Wed, 3 Feb 2021 22:40:03 +1100 (AEDT) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 10 May 2020 01:13:47 -0400, Qian Cai wrote: > It is unsafe to traverse tbl->it_group_list without the RCU read lock. > > WARNING: suspicious RCU usage > 5.7.0-rc4-next-20200508 #1 Not tainted > ----------------------------- > arch/powerpc/platforms/powernv/pci-ioda-tce.c:355 RCU-list traversed in non-reader section!! > > [...] Applied to powerpc/next. [1/1] powerpc/powernv/pci: fix a RCU-list lock https://git.kernel.org/powerpc/c/c9790fb5df461c91d3fff1d864c1acb8baf5ad5c cheers