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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 439A6C2D0A3 for ; Tue, 3 Nov 2020 19:01:52 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 705CF20786 for ; Tue, 3 Nov 2020 19:01:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 705CF20786 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4CQfK87535zDqx5 for ; Wed, 4 Nov 2020 06:01:48 +1100 (AEDT) Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4CQfGw16xLzDqRn for ; Wed, 4 Nov 2020 05:59:52 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4CQfGv5lyhz8tTk for ; Wed, 4 Nov 2020 05:59:51 +1100 (AEDT) Received: by ozlabs.org (Postfix) id 4CQfGv3ybjz9sT6; Wed, 4 Nov 2020 05:59:51 +1100 (AEDT) Authentication-Results: ozlabs.org; spf=permerror (SPF Permanent Error: Unknown mechanism found: ip:192.40.192.88/32) smtp.mailfrom=kernel.crashing.org (client-ip=63.228.1.57; helo=gate.crashing.org; envelope-from=segher@kernel.crashing.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) by ozlabs.org (Postfix) with ESMTP id 4CQfGt67bVz9sPB for ; Wed, 4 Nov 2020 05:59:50 +1100 (AEDT) Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id 0A3IwUW6030768; Tue, 3 Nov 2020 12:58:30 -0600 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id 0A3IwTab030767; Tue, 3 Nov 2020 12:58:29 -0600 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Tue, 3 Nov 2020 12:58:29 -0600 From: Segher Boessenkool To: Christophe Leroy Subject: Re: [PATCH] powerpc: Don't use asm goto for put_user() with GCC 4.9 Message-ID: <20201103185829.GM2672@gate.crashing.org> References: <20201103132915.529337-1-mpe@ellerman.id.au> <4fe837f8-ecae-f009-c193-8da386a70705@csgroup.eu> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4fe837f8-ecae-f009-c193-8da386a70705@csgroup.eu> User-Agent: Mutt/1.4.2.3i X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: schwab@linux-m68k.org, linuxppc-dev@ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Tue, Nov 03, 2020 at 03:43:55PM +0100, Christophe Leroy wrote: > Le 03/11/2020 à 14:29, Michael Ellerman a écrit : > >For now though let's just not use asm goto with GCC 4.9, to avoid this > >bug and any other issues we haven't noticed yet. Possibly in future we > >can find a smaller workaround. > > Is that https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 ? That was fixed in 4.8.1 (and all 4.9), so probably not. Segher