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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 8ADEDC433DB for ; Thu, 25 Mar 2021 11:48:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4141C619D5 for ; Thu, 25 Mar 2021 11:48:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230120AbhCYLsN (ORCPT ); Thu, 25 Mar 2021 07:48:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230455AbhCYLrg (ORCPT ); Thu, 25 Mar 2021 07:47:36 -0400 Received: from smtp-8fad.mail.infomaniak.ch (smtp-8fad.mail.infomaniak.ch [IPv6:2001:1600:3:17::8fad]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6955BC06174A for ; Thu, 25 Mar 2021 04:47:35 -0700 (PDT) Received: from smtp-3-0000.mail.infomaniak.ch (unknown [10.4.36.107]) by smtp-2-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4F5jyY4sWDzMptrn; Thu, 25 Mar 2021 12:47:33 +0100 (CET) Received: from ns3096276.ip-94-23-54.eu (unknown [23.97.221.149]) by smtp-3-0000.mail.infomaniak.ch (Postfix) with ESMTPA id 4F5jyX3qZXzlh8TW; Thu, 25 Mar 2021 12:47:32 +0100 (CET) Subject: Re: [PATCH 1/7] x86/syscalls: fix -Wmissing-prototypes warnings from COND_SYSCALL() To: Masahiro Yamada , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" Cc: linux-kernel@vger.kernel.org, =?UTF-8?Q?Micka=c3=abl_Sala=c3=bcn?= , Andy Lutomirski , Brian Gerst , Dominik Brodowski , James Morris References: <20210301131533.64671-1-masahiroy@kernel.org> <20210301131533.64671-2-masahiroy@kernel.org> From: =?UTF-8?Q?Micka=c3=abl_Sala=c3=bcn?= Message-ID: Date: Thu, 25 Mar 2021 12:48:13 +0100 User-Agent: MIME-Version: 1.0 In-Reply-To: <20210301131533.64671-2-masahiroy@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Masahiro, What is the status of this patch? Could you please push it to -next? This would avoid emails from lkp: https://lore.kernel.org/linux-security-module/202103191423.Jl0jVzfL-lkp@intel.com/ Thanks, Mickaël On 01/03/2021 14:15, Masahiro Yamada wrote: > Building kernel/sys_ni.c with W=1 emits tons of -Wmissing-prototypes > warnings. > > $ make W=1 kernel/sys_ni.o > [ snip ] > CC kernel/sys_ni.o > In file included from kernel/sys_ni.c:10: > ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_io_setup' [-Wmissing-prototypes] > 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ > | ^~ > ./arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' > 100 | __COND_SYSCALL(x64, sys_##name) > | ^~~~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' > 256 | __X64_COND_SYSCALL(name) \ > | ^~~~~~~~~~~~~~~~~~ > kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' > 39 | COND_SYSCALL(io_setup); > | ^~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_io_setup' [-Wmissing-prototypes] > 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ > | ^~ > ./arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' > 120 | __COND_SYSCALL(ia32, sys_##name) > | ^~~~~~~~~~~~~~ > ./arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' > 257 | __IA32_COND_SYSCALL(name) > | ^~~~~~~~~~~~~~~~~~~ > kernel/sys_ni.c:39:1: note: in expansion of macro 'COND_SYSCALL' > 39 | COND_SYSCALL(io_setup); > | ^~~~~~~~~~~~ > ... > > __SYS_STUB0() and __SYS_STUBx() defined a few lines above have forward > declarations. Let's do likewise for __COND_SYSCALL() to fix the > warnings. > > Signed-off-by: Masahiro Yamada > Tested-by: Mickaël Salaün > --- > > arch/x86/include/asm/syscall_wrapper.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h > index a84333adeef2..80c08c7d5e72 100644 > --- a/arch/x86/include/asm/syscall_wrapper.h > +++ b/arch/x86/include/asm/syscall_wrapper.h > @@ -80,6 +80,7 @@ extern long __ia32_sys_ni_syscall(const struct pt_regs *regs); > } > > #define __COND_SYSCALL(abi, name) \ > + __weak long __##abi##_##name(const struct pt_regs *__unused); \ > __weak long __##abi##_##name(const struct pt_regs *__unused) \ > { \ > return sys_ni_syscall(); \ >