From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnd Bergmann Subject: Re: This patch triggers a bad gcc bug (was Re: [PATCH] force inlining of some byteswap operations) Date: Mon, 18 Apr 2016 16:07:51 +0200 Message-ID: <4545519.Kr6IHPvbv3@wuerfel> References: <20160413151500.tate3u6trg4agugo@treble> <20160416090332.GA30613@gmail.com> <20160418133932.cnpxai32qn665un3@treble> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Return-path: Received: from mout.kundenserver.de ([212.227.126.133]:58407 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751497AbcDROIt (ORCPT ); Mon, 18 Apr 2016 10:08:49 -0400 In-Reply-To: <20160418133932.cnpxai32qn665un3@treble> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Josh Poimboeuf Cc: Ingo Molnar , Denys Vlasenko , James Bottomley , Thomas Graf , Peter Zijlstra , David Rientjes , Andrew Morton , linux-kernel@vger.kernel.org, linux-scsi , jamborm@gcc.gnu.org On Monday 18 April 2016 08:39:32 Josh Poimboeuf wrote: > > I agree. So how should we work around the bug in this case? There have > been several suggestions: > > - change wwn_to_u64() to __always_inline > > - change qla2x00_get_host_fabric_name() to skip the unnecessary call to > wwn_to_u64() > > - revert one of the two commits: > bc27fb68aaad ("include/uapi/linux/byteorder, swab: force inlining of some byteswap operations") > ef3fb2422ffe ("scsi: fc: use get/put_unaligned64 for wwn access") What about the patch to change get_unaligned_be64() that I posted? I think we want to merge that anyway, I just don't know if that helps with this particular problem as well. Arnd