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=-14.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT 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 960C5C41537 for ; Thu, 29 Nov 2018 17:13:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5972320863 for ; Thu, 29 Nov 2018 17:13:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linaro.org header.i=@linaro.org header.b="Z5OF9y+z" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5972320863 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org 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 S1730740AbeK3ETn (ORCPT ); Thu, 29 Nov 2018 23:19:43 -0500 Received: from mail-wr1-f67.google.com ([209.85.221.67]:34624 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730504AbeK3ETF (ORCPT ); Thu, 29 Nov 2018 23:19:05 -0500 Received: by mail-wr1-f67.google.com with SMTP id j2so2695801wrw.1 for ; Thu, 29 Nov 2018 09:13:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=5aEOue59gExXs0lNGE2h5oDrnn0K20vvi0KDkgckJZA=; b=Z5OF9y+znrVtgMNqnvDMwi6nPeaNhKQ+05e60Fkg1ExcJrgK5GqtUOBCvB1T6i5VRZ KVbW0x8U861A09P6Hm6HTBsIKl6UsS4TjKLSh7sH4O6HvWO5piv+XnzRDLk+tqZUa0ZF FBw16cuUShERLQaOGTbDSSUkCGU0dvgH/b1yw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=5aEOue59gExXs0lNGE2h5oDrnn0K20vvi0KDkgckJZA=; b=exTouzpkaPVm4pWN65UIgolDGgxaUaFsupHVwaBU146msFTPvElk6sXFFmqzoJNPCu Ned8UG+L/hanTiaDA4kqkvnGpOi3pmxQMJIhcooHj5qXkWDANlbtCnNXrhMtBGs13UPX 8aZvi5NFKTXzz7no4ttvQSPyMn2yoLgg6AIYC9gbcaqPBOh4KnO9sV+uzZdYv0KTZoDh 1oQsvF9FnoHr3Crie8ELvjVgIWAdsFjhUw2c+wC6S46ryUHW/W0cVZ1LfIG1xXp5iRqw 1GP1qMPpxWRfZFnnFiNhZQIew75GTcyB+zkYfjMcKFke/ZZA/PLZwafO2WungsUPNsrr jQ0Q== X-Gm-Message-State: AA+aEWa9TEqMiWzSqxYFsL1YajZdoJdIBBT1Y9X1EJ+M69xVdqljDnT/ W++kyvhEDfF8kcI0kPyVeOXEWQ== X-Google-Smtp-Source: AFSGD/V7OkgvrshsSBiB6vXsKbfAAISa0jvoczQnEupkv8zA6Wuz8PR1b3TY9hROx/A1Gzb0WRaL/w== X-Received: by 2002:a5d:488f:: with SMTP id g15mr2137609wrq.15.1543511579436; Thu, 29 Nov 2018 09:12:59 -0800 (PST) Received: from harold.home ([2a01:cb1d:112:6f00:f070:d240:312e:9f99]) by smtp.gmail.com with ESMTPSA id y185sm1593882wmg.34.2018.11.29.09.12.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 29 Nov 2018 09:12:58 -0800 (PST) From: Ard Biesheuvel To: linux-efi@vger.kernel.org, Ingo Molnar , Thomas Gleixner Cc: Ard Biesheuvel , linux-kernel@vger.kernel.org, Andy Lutomirski , Arend van Spriel , Bhupesh Sharma , Borislav Petkov , Dave Hansen , Eric Snowberg , Hans de Goede , Joe Perches , Jon Hunter , Julien Thierry , Marc Zyngier , Nathan Chancellor , Peter Zijlstra , Sai Praneeth Prakhya , Sedat Dilek , YiFei Zhu Subject: [PATCH 07/11] efi/libstub: Disable some warnings for x86{,_64} Date: Thu, 29 Nov 2018 18:12:26 +0100 Message-Id: <20181129171230.18699-8-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181129171230.18699-1-ard.biesheuvel@linaro.org> References: <20181129171230.18699-1-ard.biesheuvel@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nathan Chancellor When building the kernel with Clang, some disabled warnings appear because this Makefile overrides KBUILD_CFLAGS for x86{,_64}. Add them to this list so that the build is clean again. -Wpointer-sign was disabled for the whole kernel before the beginning of git history. -Waddress-of-packed-member was disabled for the whole kernel in commit bfb38988c51e ("kbuild: clang: Disable 'address-of-packed-member' warning") and for x86/boot/compressed in commit 20c6c1890455 ("x86/boot: Disable the address-of-packed-member compiler warning"). -Wgnu was disabled for the whole kernel in commit 61163efae020 ("kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang") and for x86/boot/compressed in commit 6c3b56b19730 ("x86/boot: Disable Clang warnings about GNU extensions"). Link: https://github.com/ClangBuiltLinux/linux/issues/112 Signed-off-by: Nathan Chancellor Reviewed-by: Sedat Dilek Tested-by: Sedat Dilek Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/libstub/Makefile | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index c51627660dbb..d9845099635e 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -9,7 +9,10 @@ cflags-$(CONFIG_X86_32) := -march=i386 cflags-$(CONFIG_X86_64) := -mcmodel=small cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \ -fPIC -fno-strict-aliasing -mno-red-zone \ - -mno-mmx -mno-sse -fshort-wchar + -mno-mmx -mno-sse -fshort-wchar \ + -Wno-pointer-sign \ + $(call cc-disable-warning, address-of-packed-member) \ + $(call cc-disable-warning, gnu) # arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly # disable the stackleak plugin -- 2.19.1