Received: by 2002:a25:ab43:0:0:0:0:0 with SMTP id u61csp329467ybi; Fri, 7 Jun 2019 08:43:43 -0700 (PDT) X-Google-Smtp-Source: APXvYqy2p3CBH6hRTwnfIJpqaMn1kiggVOzfBMHnSVuXRL8BaX8AURKlPt0IAGKpZvIHq+tXQ7jg X-Received: by 2002:a17:90a:7305:: with SMTP id m5mr5917278pjk.84.1559922223285; Fri, 07 Jun 2019 08:43:43 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1559922223; cv=none; d=google.com; s=arc-20160816; b=PlaFqqkUHwzn4w2eosFqWKr+Pun/Z5xezNtvg/5zDau1/0ZlbirNkYahgRI+fkqL6/ b8dsOfIvvldmnRyceJLOs4NCwoM2HG24h7fkuPICInQ3Sgsg8XZZ0LUiaqpeffEYqm4e AzFVK1p63WVpzwpEvKpjrSlNPT+KCK1803/eGRI12jXknwUUR36ShhrKhMp8kOv4oIHn UwDPw6jje8Rahpix4pQqgIo+7f0pORvGCw7AUoS0hU93NwGg1LQoJCHUXT5pkQWQaIx7 GEobPETFFJnxkiROSVBtOL/Nk1LPXzrL9wojAJX5sFx28vC6c5h6/Rzd7+4URljiKamF oAMg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=bA6dgy0kkx9Vsy+trkeMHtjr/N3tuwPDE5Nh8hgUr2I=; b=LXxnTrTW/o0aSVYv7Gre3VewRx+R43F1++kofjD/yghEHYWk53upyV2ap4XxpeVc1R 32+CV67rG969gn2uv7/EZ2B+TPvIRKspQ7PryRj7+dyAo3UqKPqEIIO4HcrRaf9/kHFL 5xcEk8gq9oYjWmMPzS+AqmypNMIOr4V2cs1onavittY5wbJ2fLQOv0SwmMzo6cMS8KsI L7oWuAQAqxV0on89BCoTqfLgivyBW4VmBB+WA9rGMB2xtbKmkcs//psZF4nGCk/4nJac p1tPgegx4rvKvxUSL4nVBKwBiNZ1mK4yJYmu9LgMtlpIPR7p+OBbG5stMvv/e9Qtn3E3 xJzg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id p1si1952570pjo.33.2019.06.07.08.43.26; Fri, 07 Jun 2019 08:43:43 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729855AbfFGPZY (ORCPT + 99 others); Fri, 7 Jun 2019 11:25:24 -0400 Received: from foss.arm.com ([217.140.110.172]:42662 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729462AbfFGPZV (ORCPT ); Fri, 7 Jun 2019 11:25:21 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D8A39346; Fri, 7 Jun 2019 08:25:20 -0700 (PDT) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D270C3F718; Fri, 7 Jun 2019 08:25:19 -0700 (PDT) Date: Fri, 7 Jun 2019 16:25:17 +0100 From: Will Deacon To: Qian Cai Cc: Dave Martin , Catalin Marinas , linux-arm-kernel@lists.infradead.org, "linux-kernel@vger.kernel.org" , Ard Biesheuvel , linux-efi@vger.kernel.org Subject: Re: "arm64: Silence gcc warnings about arch ABI drift" breaks clang Message-ID: <20190607152517.GC19862@fuggles.cambridge.arm.com> References: <1559920965.6132.56.camel@lca.pw> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1559920965.6132.56.camel@lca.pw> User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 07, 2019 at 11:22:45AM -0400, Qian Cai wrote: > The linux-next commit "arm64: Silence gcc warnings about arch ABI drift" [1] > breaks clang build where it screams that unknown option "-Wno-psabi" and > generates errors below, So that can be easily fixed with cc-option... > [1] https://lore.kernel.org/linux-arm-kernel/1559817223-32585-1-git-send-email-D > ave.Martin@arm.com/ > > ./drivers/firmware/efi/libstub/arm-stub.stub.o: In function > `install_memreserve_table': > ./linux/drivers/firmware/efi/libstub/arm-stub.c:73: undefined reference to > `__efistub___stack_chk_guard' > ./linux/drivers/firmware/efi/libstub/arm-stub.c:73: undefined reference to > `__efistub___stack_chk_guard' > ./linux/drivers/firmware/efi/libstub/arm-stub.c:93: undefined reference to > `__efistub___stack_chk_guard' > ./linux/drivers/firmware/efi/libstub/arm-stub.c:93: undefined reference to > `__efistub___stack_chk_guard' > ./linux/drivers/firmware/efi/libstub/arm-stub.c:94: undefined reference to > `__efistub___stack_chk_fail ... but this looks unrelated. Are you saying you don't see these errors if you revert Dave's patch? Will