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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 5260DC4CECE for ; Mon, 14 Oct 2019 09:35:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3524520659 for ; Mon, 14 Oct 2019 09:35:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730953AbfJNJf2 (ORCPT ); Mon, 14 Oct 2019 05:35:28 -0400 Received: from gate.crashing.org ([63.228.1.57]:43596 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730667AbfJNJf1 (ORCPT ); Mon, 14 Oct 2019 05:35:27 -0400 Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id x9E9Z2cq027678; Mon, 14 Oct 2019 04:35:02 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id x9E9Z1ac027677; Mon, 14 Oct 2019 04:35:01 -0500 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Mon, 14 Oct 2019 04:35:01 -0500 From: Segher Boessenkool To: Nathan Chancellor Cc: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , clang-built-linux@googlegroups.com, Nick Desaulniers , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 3/3] powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp Message-ID: <20191014093501.GE28442@gate.crashing.org> References: <20190911182049.77853-1-natechancellor@gmail.com> <20191014025101.18567-1-natechancellor@gmail.com> <20191014025101.18567-4-natechancellor@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191014025101.18567-4-natechancellor@gmail.com> User-Agent: Mutt/1.4.2.3i Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Oct 13, 2019 at 07:51:01PM -0700, Nathan Chancellor wrote: > r374662 gives LLVM the ability to convert certain loops into a reference > to bcmp as an optimization; this breaks prom_init_check.sh: When/why does LLVM think this is okay? This function has been removed from POSIX over a decade ago (and before that it always was marked as legacy). Segher