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=-0.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 4B983C4724C for ; Fri, 1 May 2020 17:26:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1F3362063A for ; Fri, 1 May 2020 17:26:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="D5N0geky" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729792AbgEAR0m (ORCPT ); Fri, 1 May 2020 13:26:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728933AbgEAR0h (ORCPT ); Fri, 1 May 2020 13:26:37 -0400 Received: from merlin.infradead.org (unknown [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A733FC061A0E for ; Fri, 1 May 2020 10:26:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=4s9Kc9podEipbVFwf7RgdQ5NU0qdM7rKVGMYPDm9ajc=; b=D5N0gekygXT6+UctiNnGtkNDsp QwzkvVAZSO/re5pJZgmFWCOLINt/3indQe534GOZBCt6N6RbtzC/76f3I9/C+PcyiOfbsJBYWh/vC 2aTabmU6VYmcTVKID15b6GdfwVRuaPJasIdqhMB8S2ZpyG85SZcNi8Rs6LS5DlR+3dAGpJvIH0zc+ 1/8yDG82nfnjIti7ECmTV/dRIRSkEnPhZol4CPio5d81OfAnUFvJAGwN9fMgPd8vwzqNgs59kyJly 36bMi2gm7fDG2p5EDUR8+bZpN9WSdLO/E/t6BFzepvmIu+0oSJsA9onwhZ78ZnaibgFu+jxmUiamo oAZNOKBQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jUZQY-0003Lj-FX; Fri, 01 May 2020 17:26:18 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 005CC300130; Fri, 1 May 2020 19:26:17 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id E027A29D9C091; Fri, 1 May 2020 19:26:16 +0200 (CEST) Date: Fri, 1 May 2020 19:26:16 +0200 From: Peter Zijlstra To: Arnd Bergmann Cc: Josh Poimboeuf , the arch/x86 maintainers , Linux Kernel Mailing List Subject: Re: Remaining randconfig objtool warnings, linux-next-20200428 Message-ID: <20200501172616.GG3762@hirez.programming.kicks-ass.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 01, 2020 at 07:21:31PM +0200, Arnd Bergmann wrote: > On Thu, Apr 30, 2020 at 4:05 PM Arnd Bergmann wrote: > it gets into undefined behavior and stops emitting code after the call to > Do we consider this expected behavior on gcc's side, or is it something > that should not happen and needs a gcc bug report? When it hits UB it is of course free to do whatever it damn well pleases, but just stopping code gen seems a little extreme, at least issue a WARN that something is up or so. Not sure how the GCC folks feel about this though.