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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B788C433F5 for ; Tue, 30 Nov 2021 13:12:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239258AbhK3NPv (ORCPT ); Tue, 30 Nov 2021 08:15:51 -0500 Received: from sin.source.kernel.org ([145.40.73.55]:55782 "EHLO sin.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236093AbhK3NPs (ORCPT ); Tue, 30 Nov 2021 08:15:48 -0500 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 sin.source.kernel.org (Postfix) with ESMTPS id 664F6CE19FE for ; Tue, 30 Nov 2021 13:12:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 90CA8C53FC7 for ; Tue, 30 Nov 2021 13:12:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638277946; bh=7Jp5scVEy5mI/G2kiMqwA+jZ6W9F59pkGVYXY6aCCqU=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=Ebp0csiwXCfFkjkSH/kmmBzdS7Xpq5X43oB7pgouteHAOxHFAETknmbrGu8l4ezbV /JLTx8BPtfe5bQKJ6ht8DAmwhR6GmgBN7CgmmjWIwrUMxBLk9RObedAclI8/boa6PL 84lF8aNxn8o3iWU2DmlpW++dwKh2gxnUOHCBoHgb/8FANBaK7ufnvkP8r0rRBsJvJm K9ZXFNmoYs/AVforritNuPLvGy/Dj8balwbTIW49w4byJ5YC7yw6KU2sivqalaVOyE CaGrg5djHWWD5/pl0IaSaLc/QD8yvX7RjY+VdR9agYqsZvQRGYmBchAmm+hGJJJ5Nv DCFZnKh1C6/rQ== Received: by mail-oo1-f46.google.com with SMTP id w5-20020a4a2745000000b002c2649b8d5fso6677160oow.10 for ; Tue, 30 Nov 2021 05:12:26 -0800 (PST) X-Gm-Message-State: AOAM530ct9qml+e6ora/Pi2N2asAjtULWhw5ZTTzzafGp8arHEbHG3+1 cQuUiTHnkB/ymRt6tF1prftu5hxHRZGeoHY/TaE= X-Google-Smtp-Source: ABdhPJwAZ391NHSXEptRBPTPOpfcyKVJmW0+b+XHnPKjZQ/TvLVpV1LohJo16UbYFKDNPEPol8PoCmZJ7ZvVgIuvyWk= X-Received: by 2002:a4a:a641:: with SMTP id j1mr35370708oom.63.1638277945792; Tue, 30 Nov 2021 05:12:25 -0800 (PST) MIME-Version: 1.0 References: <202111250918.ErFZktQF-lkp@intel.com> In-Reply-To: <202111250918.ErFZktQF-lkp@intel.com> From: Ard Biesheuvel Date: Tue, 30 Nov 2021 14:12:14 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [ardb:for-kernelci 25/25] arch/arm/kernel/traps.c:865:17: warning: no previous prototype for function 'handle_bad_stack' To: kernel test robot Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 25 Nov 2021 at 02:35, kernel test robot wrote: > > tree: git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git for-kernelci > head: 5da04a8b7050432b72f6551b6c95e4b5b5fd68d1 > commit: 5da04a8b7050432b72f6551b6c95e4b5b5fd68d1 [25/25] ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems > config: arm-randconfig-r024-20211124 (https://download.01.org/0day-ci/archive/20211125/202111250918.ErFZktQF-lkp@intel.com/config) > compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c) > reproduce (this is a W=1 build): > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # install arm cross compiling tool for clang build > # apt-get install binutils-arm-linux-gnueabi > # https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?id=5da04a8b7050432b72f6551b6c95e4b5b5fd68d1 > git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git > git fetch --no-tags ardb for-kernelci > git checkout 5da04a8b7050432b72f6551b6c95e4b5b5fd68d1 > # save the config file to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot > > All warnings (new ones prefixed by >>): > This is yet another false positive. asmlinkage routines don't need a prototype because they are called from assembler. This is not going to get fixed, so please don't report this error anymore. > arch/arm/kernel/traps.c:95:6: warning: no previous prototype for function 'dump_backtrace_stm' [-Wmissing-prototypes] > void dump_backtrace_stm(u32 *stack, u32 instruction, const char *loglvl) > ^ > arch/arm/kernel/traps.c:95:1: note: declare 'static' if the function is not intended to be used outside of this translation unit > void dump_backtrace_stm(u32 *stack, u32 instruction, const char *loglvl) > ^ > static > arch/arm/kernel/traps.c:446:17: warning: no previous prototype for function 'do_undefinstr' [-Wmissing-prototypes] > asmlinkage void do_undefinstr(struct pt_regs *regs) > ^ > arch/arm/kernel/traps.c:446:12: note: declare 'static' if the function is not intended to be used outside of this translation unit > asmlinkage void do_undefinstr(struct pt_regs *regs) > ^ > static > arch/arm/kernel/traps.c:511:39: warning: no previous prototype for function 'handle_fiq_as_nmi' [-Wmissing-prototypes] > asmlinkage void __exception_irq_entry handle_fiq_as_nmi(struct pt_regs *regs) > ^ > arch/arm/kernel/traps.c:511:12: note: declare 'static' if the function is not intended to be used outside of this translation unit > asmlinkage void __exception_irq_entry handle_fiq_as_nmi(struct pt_regs *regs) > ^ > static > arch/arm/kernel/traps.c:530:17: warning: no previous prototype for function 'bad_mode' [-Wmissing-prototypes] > asmlinkage void bad_mode(struct pt_regs *regs, int reason) > ^ > arch/arm/kernel/traps.c:530:12: note: declare 'static' if the function is not intended to be used outside of this translation unit > asmlinkage void bad_mode(struct pt_regs *regs, int reason) > ^ > static > arch/arm/kernel/traps.c:603:16: warning: no previous prototype for function 'arm_syscall' [-Wmissing-prototypes] > asmlinkage int arm_syscall(int no, struct pt_regs *regs) > ^ > arch/arm/kernel/traps.c:603:12: note: declare 'static' if the function is not intended to be used outside of this translation unit > asmlinkage int arm_syscall(int no, struct pt_regs *regs) > ^ > static > arch/arm/kernel/traps.c:729:1: warning: no previous prototype for function 'baddataabort' [-Wmissing-prototypes] > baddataabort(int code, unsigned long instr, struct pt_regs *regs) > ^ > arch/arm/kernel/traps.c:728:12: note: declare 'static' if the function is not intended to be used outside of this translation unit > asmlinkage void > ^ > static > arch/arm/kernel/traps.c:769:17: warning: no previous prototype for function '__div0' [-Wmissing-prototypes] > asmlinkage void __div0(void) > ^ > arch/arm/kernel/traps.c:769:12: note: declare 'static' if the function is not intended to be used outside of this translation unit > asmlinkage void __div0(void) > ^ > static > >> arch/arm/kernel/traps.c:865:17: warning: no previous prototype for function 'handle_bad_stack' [-Wmissing-prototypes] > asmlinkage void handle_bad_stack(struct pt_regs *regs) > ^ > arch/arm/kernel/traps.c:865:12: note: declare 'static' if the function is not intended to be used outside of this translation unit > asmlinkage void handle_bad_stack(struct pt_regs *regs) > ^ > static > 8 warnings generated. > > > vim +/handle_bad_stack +865 arch/arm/kernel/traps.c > > adc7d753de62f2 Ard Biesheuvel 2021-09-23 864 > adc7d753de62f2 Ard Biesheuvel 2021-09-23 @865 asmlinkage void handle_bad_stack(struct pt_regs *regs) > adc7d753de62f2 Ard Biesheuvel 2021-09-23 866 { > adc7d753de62f2 Ard Biesheuvel 2021-09-23 867 unsigned long tsk_stk = (unsigned long)current->stack; > 5da04a8b705043 Ard Biesheuvel 2021-11-24 868 #ifdef CONFIG_IRQSTACKS > adc7d753de62f2 Ard Biesheuvel 2021-09-23 869 unsigned long irq_stk = (unsigned long)this_cpu_read(irq_stack_ptr); > 5da04a8b705043 Ard Biesheuvel 2021-11-24 870 #endif > adc7d753de62f2 Ard Biesheuvel 2021-09-23 871 unsigned long ovf_stk = (unsigned long)this_cpu_read(overflow_stack_ptr); > adc7d753de62f2 Ard Biesheuvel 2021-09-23 872 > adc7d753de62f2 Ard Biesheuvel 2021-09-23 873 console_verbose(); > adc7d753de62f2 Ard Biesheuvel 2021-09-23 874 pr_emerg("Insufficient stack space to handle exception!"); > adc7d753de62f2 Ard Biesheuvel 2021-09-23 875 > adc7d753de62f2 Ard Biesheuvel 2021-09-23 876 pr_emerg("Task stack: [0x%08lx..0x%08lx]\n", > adc7d753de62f2 Ard Biesheuvel 2021-09-23 877 tsk_stk, tsk_stk + THREAD_SIZE); > 5da04a8b705043 Ard Biesheuvel 2021-11-24 878 #ifdef CONFIG_IRQSTACKS > adc7d753de62f2 Ard Biesheuvel 2021-09-23 879 pr_emerg("IRQ stack: [0x%08lx..0x%08lx]\n", > adc7d753de62f2 Ard Biesheuvel 2021-09-23 880 irq_stk - THREAD_SIZE, irq_stk); > 5da04a8b705043 Ard Biesheuvel 2021-11-24 881 #endif > adc7d753de62f2 Ard Biesheuvel 2021-09-23 882 pr_emerg("Overflow stack: [0x%08lx..0x%08lx]\n", > adc7d753de62f2 Ard Biesheuvel 2021-09-23 883 ovf_stk - OVERFLOW_STACK_SIZE, ovf_stk); > adc7d753de62f2 Ard Biesheuvel 2021-09-23 884 > adc7d753de62f2 Ard Biesheuvel 2021-09-23 885 die("kernel stack overflow", regs, 0); > adc7d753de62f2 Ard Biesheuvel 2021-09-23 886 } > adc7d753de62f2 Ard Biesheuvel 2021-09-23 887 > > :::::: The code at line 865 was first introduced by commit > :::::: adc7d753de62f220505f528106a6d618104302c5 ARM: implement support for vmap'ed stacks > > :::::: TO: Ard Biesheuvel > :::::: CC: Ard Biesheuvel > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org