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=-18.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 63091C433DF for ; Mon, 3 Aug 2020 12:48:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2E59220678 for ; Mon, 3 Aug 2020 12:48:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596458917; bh=2Rf00zb0NiJrc2Hsb0wQlosMgVlGXbTqxrdugp9D0xA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Op5Zp1UXPxYoJ6umur/rPwloJeMU1gZ1gS5ZW7AyXoa5aoU1PuZ2dIZoeRbeOh40P uzV9ZgPhz0RxQ9IxReG7gX9O/VjBPQYdqwXmwOCuk/GoqytMsC9ytw+acuAoqYdAVb wFkgGDltWLFshfJQVKZmWPKzCPGQ9V+KmR2xGHjM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728078AbgHCMYs (ORCPT ); Mon, 3 Aug 2020 08:24:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:49036 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728047AbgHCMYj (ORCPT ); Mon, 3 Aug 2020 08:24:39 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 209E4207DF; Mon, 3 Aug 2020 12:24:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596457478; bh=2Rf00zb0NiJrc2Hsb0wQlosMgVlGXbTqxrdugp9D0xA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YL+2cZhY+RZKKIxwKLc7dfUzPIbtlU2nYPsQ3j7DVW4NpOITP0Y+eenOwWTCVZwih oa4taS1G7ptI1tH/SnrHgdq2Qh9ZgflGx4F7EpPC781jXnMtlqY0XuERfyvEKtUvPo 8BW6uYljmuD6xj9uPFsFOibA0qWe/upjjMNWZk8k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sami Tolvanen , Will Deacon , Sasha Levin Subject: [PATCH 5.7 082/120] arm64/alternatives: move length validation inside the subsection Date: Mon, 3 Aug 2020 14:19:00 +0200 Message-Id: <20200803121906.864468101@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200803121902.860751811@linuxfoundation.org> References: <20200803121902.860751811@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sami Tolvanen [ Upstream commit 966a0acce2fca776391823381dba95c40e03c339 ] Commit f7b93d42945c ("arm64/alternatives: use subsections for replacement sequences") breaks LLVM's integrated assembler, because due to its one-pass design, it cannot compute instruction sequence lengths before the layout for the subsection has been finalized. This change fixes the build by moving the .org directives inside the subsection, so they are processed after the subsection layout is known. Fixes: f7b93d42945c ("arm64/alternatives: use subsections for replacement sequences") Signed-off-by: Sami Tolvanen Link: https://github.com/ClangBuiltLinux/linux/issues/1078 Link: https://lore.kernel.org/r/20200730153701.3892953-1-samitolvanen@google.com Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/include/asm/alternative.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/alternative.h b/arch/arm64/include/asm/alternative.h index 12f0eb56a1cc3..619db9b4c9d5c 100644 --- a/arch/arm64/include/asm/alternative.h +++ b/arch/arm64/include/asm/alternative.h @@ -77,9 +77,9 @@ static inline void apply_alternatives_module(void *start, size_t length) { } "663:\n\t" \ newinstr "\n" \ "664:\n\t" \ - ".previous\n\t" \ ".org . - (664b-663b) + (662b-661b)\n\t" \ - ".org . - (662b-661b) + (664b-663b)\n" \ + ".org . - (662b-661b) + (664b-663b)\n\t" \ + ".previous\n" \ ".endif\n" #define __ALTERNATIVE_CFG_CB(oldinstr, feature, cfg_enabled, cb) \ -- 2.25.1