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=-5.8 required=3.0 tests=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 63EF3C433E0 for ; Tue, 9 Jun 2020 05:28:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 438DC207ED for ; Tue, 9 Jun 2020 05:28:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727103AbgFIF2i (ORCPT ); Tue, 9 Jun 2020 01:28:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726120AbgFIF2h (ORCPT ); Tue, 9 Jun 2020 01:28:37 -0400 Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52B19C03E969 for ; Mon, 8 Jun 2020 22:28:37 -0700 (PDT) Received: by ozlabs.org (Postfix, from userid 1034) id 49gzDf6lyCz9sTH; Tue, 9 Jun 2020 15:28:34 +1000 (AEST) From: Michael Ellerman To: mpe@ellerman.id.au, Qian Cai Cc: linuxppc-dev@lists.ozlabs.org, rashmicy@gmail.com, linux-kernel@vger.kernel.org In-Reply-To: <20200306044852.3236-1-cai@lca.pw> References: <20200306044852.3236-1-cai@lca.pw> Subject: Re: [PATCH v3] powerpc/64s/pgtable: fix an undefined behaviour Message-Id: <159168031307.1381411.14671547649283777399.b4-ty@ellerman.id.au> Date: Tue, 9 Jun 2020 15:28:34 +1000 (AEST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 5 Mar 2020 23:48:52 -0500, Qian Cai wrote: > Booting a power9 server with hash MMU could trigger an undefined > behaviour because pud_offset(p4d, 0) will do, > > 0 >> (PAGE_SHIFT:16 + PTE_INDEX_SIZE:8 + H_PMD_INDEX_SIZE:10) > > Fix it by converting pud_index() and friends to static inline > functions. > > [...] Applied to powerpc/next. [1/1] powerpc/64s/pgtable: fix an undefined behaviour https://git.kernel.org/powerpc/c/c2e929b18cea6cbf71364f22d742d9aad7f4677a cheers