From patchwork Tue May 16 19:35:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 13243615 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C71DEC77B7F for ; Tue, 16 May 2023 19:36:44 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.535569.833438 (Exim 4.92) (envelope-from ) id 1pz0TL-0003Kk-T0; Tue, 16 May 2023 19:36:35 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 535569.833438; Tue, 16 May 2023 19:36:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pz0TL-0003Kd-Pw; Tue, 16 May 2023 19:36:35 +0000 Received: by outflank-mailman (input) for mailman id 535569; Tue, 16 May 2023 19:36:34 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1pz0TK-0001kC-IQ for xen-devel@lists.xenproject.org; Tue, 16 May 2023 19:36:34 +0000 Received: from dfw.source.kernel.org (dfw.source.kernel.org [2604:1380:4641:c500::1]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id f671ba2c-f420-11ed-b229-6b7b168915f2; Tue, 16 May 2023 21:36:33 +0200 (CEST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9E97263E84; Tue, 16 May 2023 19:36:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6DA1EC4339B; Tue, 16 May 2023 19:36:26 +0000 (UTC) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: f671ba2c-f420-11ed-b229-6b7b168915f2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1684265792; bh=NCehg1lkd+BZGGfLe6zB+YpAMyX3wRQS6FlZqTExKsY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pMmYMmj61h1ryVXMWXgEPNi4c4GgRS8wGlxnCd9UxrJ05iwjecyfTOduY+WoqWZpO Cvm/AJCD+MXi+4Shut/6HQufiGCdANXUBd424+CiNufUW6Mt2CPMf2SX0Erut/1Yjz CZmpdbkHOQ1xlqE6pSRjeDiYME9avcj4NHsxu1xrpZ1j/RY+4x7QvymeScI7FPaZ6A 7vr/gZpCa3X1Nt6lxKZnO93JGkaChZ3M73Qb3fsEPkq2r9hKpfzvuhPaebh6V7v7p/ EnZrHT3z5U/r3Es9dGNnRROzYJFVNwRgJqycAOQQGvYgjBv9ea9EtDpGHUpfp80+kM +ZmQV+6dglcAw== From: Arnd Bergmann To: x86@kernel.org Cc: Arnd Bergmann , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Steven Rostedt , Masami Hiramatsu , Mark Rutland , Juergen Gross , "Srivatsa S. Bhat (VMware)" , Alexey Makhalov , VMware PV-Drivers Reviewers , Peter Zijlstra , Darren Hart , Andy Shevchenko , Boris Ostrovsky , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-pci@vger.kernel.org, platform-driver-x86@vger.kernel.org, xen-devel@lists.xenproject.org, linux-pm@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 04/20] x86: avoid unneeded __div64_32 function definition Date: Tue, 16 May 2023 21:35:33 +0200 Message-Id: <20230516193549.544673-5-arnd@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230516193549.544673-1-arnd@kernel.org> References: <20230516193549.544673-1-arnd@kernel.org> MIME-Version: 1.0 From: Arnd Bergmann The __div64_32() function is provided for 32-bit architectures that don't have a custom do_div() implementation. x86_32 has one, and does not use the header file that declares the function prototype, so the definition causes a W=1 warning: lib/math/div64.c:31:32: error: no previous prototype for '__div64_32' [-Werror=missing-prototypes] Define an empty macro to prevent the function definition from getting built, which avoids the warning and saves a little .text space. Signed-off-by: Arnd Bergmann --- arch/x86/include/asm/div64.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/include/asm/div64.h b/arch/x86/include/asm/div64.h index b8f1dc0761e4..9826d5fc12e3 100644 --- a/arch/x86/include/asm/div64.h +++ b/arch/x86/include/asm/div64.h @@ -71,6 +71,8 @@ static inline u64 mul_u32_u32(u32 a, u32 b) } #define mul_u32_u32 mul_u32_u32 +#define __div64_32 /* not needed */ + #else # include