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=-17.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,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 50CEAC433DB for ; Mon, 1 Mar 2021 13:18:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B6B064E07 for ; Mon, 1 Mar 2021 13:18:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235613AbhCANSV (ORCPT ); Mon, 1 Mar 2021 08:18:21 -0500 Received: from conuserg-08.nifty.com ([210.131.2.75]:36802 "EHLO conuserg-08.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235519AbhCANSG (ORCPT ); Mon, 1 Mar 2021 08:18:06 -0500 Received: from oscar.flets-west.jp (softbank126026090165.bbtec.net [126.26.90.165]) (authenticated) by conuserg-08.nifty.com with ESMTP id 121DFe7S026106; Mon, 1 Mar 2021 22:15:42 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-08.nifty.com 121DFe7S026106 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1614604542; bh=Uj/w33doMEPc1pk+Fe2UT0I8Ph5yO71n2VzPawTfuH4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oLunmKlxWrVYRqwHlVtF+9PRaBM7Nflc+1Ro6uB8xFH/Iq2TePVYJsJrGiaHYc3tC 9tEZuRSyjUPvB7F2GAkKVwfyYWrwrIf+eYkWC/KRV7HQ3rc5qYeAb3uqyhNk9GWubF 8eSskNyktTdEQzNh/IwCGcaLiVDTEM8KZKSO9pndOlCMZaj4HN9tGIsvgbxEVME9i3 2QFxHj/voDZ6LtNlODKOCJ3bVyfgCUVdo7QZDyKsQTsYqKWMhhjq1mt4WDSkTocSOZ +By/EV7s82q2Q9uzUTOm5Pw84KOeg3sncvXvkq/7YuFjdp2Y338aB1mnMqZALqb8aQ 0Lf5/GSxbnNyg== X-Nifty-SrcIP: [126.26.90.165] From: Masahiro Yamada To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H . Peter Anvin" Cc: linux-kernel@vger.kernel.org, Masahiro Yamada , =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= , Andy Lutomirski , Brian Gerst , Dominik Brodowski Subject: [PATCH 1/7] x86/syscalls: fix -Wmissing-prototypes warnings from COND_SYSCALL() Date: Mon, 1 Mar 2021 22:15:26 +0900 Message-Id: <20210301131533.64671-2-masahiroy@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210301131533.64671-1-masahiroy@kernel.org> References: <20210301131533.64671-1-masahiroy@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(); \ -- 2.27.0