linux-kernel - Re: [ammarfaizi2-block:arm64/linux/for-next/misc 2/2] arch/arm64/kernel/irq.c:81:6: warning: no previous prototype for function 'do_softirq_own

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Date:   Fri, 9 Sep 2022 19:00:00 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Qi Zheng <zhengqi.arch@...edance.com>
Cc:     Arnd Bergmann <arnd@...db.de>, kernel test robot <lkp@...el.com>,
        llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        Ammar Faizi <ammarfaizi2@...weeb.org>,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [ammarfaizi2-block:arm64/linux/for-next/misc 2/2]
 arch/arm64/kernel/irq.c:81:6: warning: no previous prototype for function
 'do_softirq_own_stack'

On Fri, Sep 09, 2022 at 03:07:36PM +0800, Qi Zheng wrote:
> On 2022/9/9 14:30, Arnd Bergmann wrote:
> > On Fri, Sep 9, 2022, at 5:12 AM, kernel test robot wrote:
> > > tree:   https://github.com/ammarfaizi2/linux-block
> > > arm64/linux/for-next/misc
> > > head:   2d2f3bb897a3de4190b1b6b296c3429d01327554
> > > commit: 2d2f3bb897a3de4190b1b6b296c3429d01327554 [2/2] arm64: run
> > > softirqs on the per-CPU IRQ stack
> > > config: arm64-randconfig-r023-20220907
> > > compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project
> > > 1546df49f5a6d09df78f569e4137ddb365a3e827)
> > > 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 arm64 cross compiling tool for clang build
> > >          # apt-get install binutils-aarch64-linux-gnu
> > >          #
> > > https://github.com/ammarfaizi2/linux-block/commit/2d2f3bb897a3de4190b1b6b296c3429d01327554
> > >          git remote add ammarfaizi2-block
> > > https://github.com/ammarfaizi2/linux-block
> > >          git fetch --no-tags ammarfaizi2-block arm64/linux/for-next/misc
> > >          git checkout 2d2f3bb897a3de4190b1b6b296c3429d01327554
> > >          # save the config file
> > >          mkdir build_dir && cp config build_dir/.config
> > >          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1
> > > O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kernel/
> > > 
> > > If you fix the issue, kindly add following tag where applicable
> > > Reported-by: kernel test robot <lkp@...el.com>
> > > 
> > > All warnings (new ones prefixed by >>):
> > > 
> > > > > arch/arm64/kernel/irq.c:81:6: warning: no previous prototype for function 'do_softirq_own_stack' [-Wmissing-prototypes]
> > >     void do_softirq_own_stack(void)
> > >          ^
> > >     arch/arm64/kernel/irq.c:81:1: note: declare 'static' if the function
> > > is not intended to be used outside of this translation unit
> > >     void do_softirq_own_stack(void)
> > >     ^
> > >     static
> > 
> > 
> > I think we are missing an "#include <asm/softirq_stack.h>"
> > in arch/arm64/kernel/irq.c
> 
> Indeed. Hi Catalin, do I need to resend the v4 version? Or can you help
> me to apply the following code change to the for-next/misc directly?
> Both are fine for me, depending on which way is convenient for you. :)

I'll fold this in, that's the easiest.

Thanks.

-- 
Catalin