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=-3.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, URIBL_BLOCKED autolearn=ham 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 0E916C2BC61 for ; Mon, 29 Oct 2018 13:06:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BADC22082D for ; Mon, 29 Oct 2018 13:06:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nifty.com header.i=@nifty.com header.b="UW3hK+Ob" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BADC22082D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=socionext.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726995AbeJ2VzM (ORCPT ); Mon, 29 Oct 2018 17:55:12 -0400 Received: from conssluserg-03.nifty.com ([210.131.2.82]:27695 "EHLO conssluserg-03.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725915AbeJ2VzM (ORCPT ); Mon, 29 Oct 2018 17:55:12 -0400 Received: from mail-vk1-f181.google.com (mail-vk1-f181.google.com [209.85.221.181]) (authenticated) by conssluserg-03.nifty.com with ESMTP id w9TD6Lvp014252; Mon, 29 Oct 2018 22:06:21 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conssluserg-03.nifty.com w9TD6Lvp014252 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1540818382; bh=XGKSz0bIM4/JAST1orHUNl+mRfR3WEzEEwi8+D/NAx8=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=UW3hK+Ob0bdnhpEgIajdvBxc5y+NlamK3u8cN2w/p3fB57jdLU3k0gBLhi9XULLRH WRBPsZ2k7ARrM8W45ud/E+HqTH8DJT/+1MDTpo2LAKIva3C7wOX1d/Ro/0gccrlYVV 8AE02NbB1/k1RgI/x+6+sVs7DCZsxxZl+4achXJWYF8KDzWbsbQbMNbwcZ6bF+KsO+ TDxuvwZ+twevtUIbrl24um+B9Z3KQKCW6EkMZ7Jq16eKEIK7TzcK4wvELkcYvcGQG8 M1T+3k5P1BNVgBtQjvh3DVX/QH60zEAKzP6HL9DkZj8/aCj0Z5gitG7jX3B54dPlUN 4hXG+asJ/S2KA== X-Nifty-SrcIP: [209.85.221.181] Received: by mail-vk1-f181.google.com with SMTP id j20so2010174vke.5; Mon, 29 Oct 2018 06:06:21 -0700 (PDT) X-Gm-Message-State: AGRZ1gJ7oabM+LxErtol/E/LmtNir3hE8jb1PGhyNd9vkhbJv6EdIK9S vz8JsKXkR29Z8JsZMXaxEw5tDqgfMzmUX1F5w5M= X-Google-Smtp-Source: AJdET5ffRkwnggUrhtzIL7RHW5a6uIiYJDbORXsA0Qs7pUJfN7tCjcgwM4Q1IFxN3vGDNflXP3ZfVXjjsV5zH1rZTMA= X-Received: by 2002:a1f:a014:: with SMTP id j20mr5764131vke.64.1540818380381; Mon, 29 Oct 2018 06:06:20 -0700 (PDT) MIME-Version: 1.0 References: <20181028130945.23581-1-changbin.du@gmail.com> <20181028130945.23581-4-changbin.du@gmail.com> In-Reply-To: <20181028130945.23581-4-changbin.du@gmail.com> From: Masahiro Yamada Date: Mon, 29 Oct 2018 22:05:44 +0900 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v3 3/4] ARM: mm: fix build error in fix_to_virt with CONFIG_CC_OPTIMIZE_FOR_DEBUGGING To: Changbin Du Cc: Michal Marek , Thomas Gleixner , Ingo Molnar , Russell King , Andrew Morton , Greg Kroah-Hartman , Steven Rostedt , X86 ML , Linux Kbuild mailing list , Linux Kernel Mailing List , linux-arm-kernel , linux-sparse@vger.kernel.org, Robin Murphy Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Oct 28, 2018 at 10:13 PM Changbin Du wrote: > > With '-Og' optimization level, GCC would not optimize a count for a loop > as a constant value. But BUILD_BUG_ON() only accept compile-time constant > values. Let's use __fix_to_virt() to avoid the error. > > arch/arm/mm/mmu.o: In function `fix_to_virt': > /home/changbin/work/linux/./include/asm-generic/fixmap.h:31: undefined reference to `__compiletime_assert_31' > Makefile:1051: recipe for target 'vmlinux' failed > make: *** [vmlinux] Error 1 > > Signed-off-by: Changbin Du > Acked-by: Steven Rostedt (VMware) > --- Applied to linux-kbuild -- Best Regards Masahiro Yamada