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=-23.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, URIBL_RED,USER_AGENT_GIT autolearn=unavailable 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 03569C43331 for ; Mon, 28 Dec 2020 16:13:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3446207C9 for ; Mon, 28 Dec 2020 16:13:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733080AbgL1NTx (ORCPT ); Mon, 28 Dec 2020 08:19:53 -0500 Received: from mail.kernel.org ([198.145.29.99]:48458 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733006AbgL1NTx (ORCPT ); Mon, 28 Dec 2020 08:19:53 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9D48F22583; Mon, 28 Dec 2020 13:19:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609161552; bh=C3YwL2f4xogoUOPxv3liD/thayajrduA9lFFDYXaz+E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VbJ2DTMmBnrYbWLCmyboBemxCiQtDgoY0I6GMs8grdDKvnb+ubuyynw6xvAsK1kwm IifAGCrV/OTZjSFqcmNZWJW1dzAKfP5qGkGu0XIxDEOaMX7csl0I6Bp1cL/NeWly9g xFoREWYCnP3ib7bESx8sHSyhOUnPciXfTpOyaUes= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Golovin , Nathan Chancellor , Sedat Dilek , Fangrui Song , Nick Desaulniers , Masahiro Yamada Subject: [PATCH 4.19 001/346] Kbuild: do not emit debug info for assembly with LLVM_IAS=1 Date: Mon, 28 Dec 2020 13:45:20 +0100 Message-Id: <20201228124919.821830406@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228124919.745526410@linuxfoundation.org> References: <20201228124919.745526410@linuxfoundation.org> User-Agent: quilt/0.66 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Nick Desaulniers commit b8a9092330da2030496ff357272f342eb970d51b upstream. Clang's integrated assembler produces the warning for assembly files: warning: DWARF2 only supports one section per compilation unit If -Wa,-gdwarf-* is unspecified, then debug info is not emitted for assembly sources (it is still emitted for C sources). This will be re-enabled for newer DWARF versions in a follow up patch. Enables defconfig+CONFIG_DEBUG_INFO to build cleanly with LLVM=1 LLVM_IAS=1 for x86_64 and arm64. Cc: Link: https://github.com/ClangBuiltLinux/linux/issues/716 Reported-by: Dmitry Golovin Reported-by: Nathan Chancellor Suggested-by: Dmitry Golovin Suggested-by: Nathan Chancellor Suggested-by: Sedat Dilek Reviewed-by: Fangrui Song Reviewed-by: Nathan Chancellor Signed-off-by: Nick Desaulniers Signed-off-by: Masahiro Yamada [nd: backport to avoid conflicts from: commit 10e68b02c861 ("Makefile: support compressed debug info") commit 7b16994437c7 ("Makefile: Improve compressed debug info support detection") commit 695afd3d7d58 ("kbuild: Simplify DEBUG_INFO Kconfig handling")] Signed-off-by: Greg Kroah-Hartman --- Makefile | 3 +++ 1 file changed, 3 insertions(+) --- a/Makefile +++ b/Makefile @@ -745,8 +745,11 @@ KBUILD_CFLAGS += $(call cc-option, -gs else KBUILD_CFLAGS += -g endif +ifneq ($(LLVM_IAS),1) KBUILD_AFLAGS += -Wa,-gdwarf-2 endif +endif + ifdef CONFIG_DEBUG_INFO_DWARF4 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) endif