Received: by 2002:a05:6a10:1d13:0:0:0:0 with SMTP id pp19csp1322403pxb; Fri, 27 Aug 2021 06:27:50 -0700 (PDT) X-Google-Smtp-Source: ABdhPJy1LaLLPH789WbaDNsKe6bTN3aRml62T2BoTU4NaHFp2Y8Hw5OO+P65vYiF+DOHEJ5FkH6a X-Received: by 2002:a17:906:2541:: with SMTP id j1mr10493727ejb.128.1630070869968; Fri, 27 Aug 2021 06:27:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1630070869; cv=none; d=google.com; s=arc-20160816; b=VorLcshJ55kzn6Hdm8vrAbSaquBRDhjkjSCax/5SHdGrsa/Zy5yRJShj8lf4DjbqZu mbCjBwQw0bWT/kGPB7mYmf7SqMDZe+WvPl1M+OgkGRYVPEoPoHivh2VQmjbIowT7N6In RqWmLaTXhVct3+2QA5ef02nxHPt1u/xAJ+hwEGdQE6drYllov9rYeUPy00MzX7bx7dtV bN7HDXfnQ2iOw61L+AfnAQVzlM+USyRJ/6FEIPscaNlFuOmdTRw7GD59wpe6+6a5RJDl LvUWsdqaTOz5z1YpEHPdKAxDuK81U34m+1lC1BAuq4TOLKoWF5iQkBSd4iQ+1rtQl3x0 c7AQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version:date :message-id:subject:references:in-reply-to:cc:to:from; bh=brZNj6V2kQFOcIjB5c6qUJi/7VJVq7n51b65UXarnW8=; b=bgGH/w3jy4A3SL+LAInAeC2IoWzjCxohzJRnm9VeSTW3R/AEn7+7bFVYtSyc8zSplX M0A4SlAGTU7YOEky2yDhWZUcaf9bnQLMhcMaRPP7xpIihlD+6Z7Fy1+4F3iWWDyE1q7/ PRelC6gY8znQTLG1P32igOO7vcyCU8Qp24OMe62Lk+HG1YLIxgD9JW+CHRBXEMzuN77+ mw8vKf5+A952sa1RT5288c9FImzuFlHv2MD0KnQA+JpgAavE7OLWbJuupjhze5PehJGX IbNUVjuBngC/HIkTQh6vAkG0e000GL5kwLNAYz/oAQAV4Dk+TsoTKQqCW+yijEZj8DBL 8Eww== ARC-Authentication-Results: i=1; mx.google.com; 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id k24si6212312edv.610.2021.08.27.06.27.25; Fri, 27 Aug 2021 06:27:49 -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; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245425AbhH0NXm (ORCPT + 99 others); Fri, 27 Aug 2021 09:23:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33212 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245321AbhH0NXZ (ORCPT ); Fri, 27 Aug 2021 09:23:25 -0400 Received: from ozlabs.org (ozlabs.org [IPv6:2401:3900:2:1::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14CBAC0613CF for ; Fri, 27 Aug 2021 06:22:23 -0700 (PDT) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Gx0kN1kFpz9t5H; Fri, 27 Aug 2021 23:22:20 +1000 (AEST) From: Michael Ellerman To: Michael Ellerman , Christophe Leroy , Paul Mackerras , Benjamin Herrenschmidt Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org In-Reply-To: References: Subject: Re: [PATCH v3] powerpc/booke: Avoid link stack corruption in several places Message-Id: <163007015656.52768.14712592105092490367.b4-ty@ellerman.id.au> Date: Fri, 27 Aug 2021 23:15:56 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 24 Aug 2021 07:56:26 +0000 (UTC), Christophe Leroy wrote: > Use bcl 20,31,+4 instead of bl in order to preserve link stack. > > See commit c974809a26a1 ("powerpc/vdso: Avoid link stack corruption > in __get_datapage()") for details. > > > > [...] Applied to powerpc/next. [1/1] powerpc/booke: Avoid link stack corruption in several places https://git.kernel.org/powerpc/c/f5007dbf4da729baa850b33a64dc3cc53757bdf8 cheers