linux-kernel - Re: arch/powerpc/kvm/e500mc.c:171:5: error: no previous prototype for 'kvmppc_e500mc_check_processor

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Date:   Tue, 7 Mar 2023 17:08:01 -0800
From:   Sean Christopherson <seanjc@...gle.com>
To:     kernel test robot <lkp@...el.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: arch/powerpc/kvm/e500mc.c:171:5: error: no previous prototype for 'kvmppc_e500mc_check_processor_compat'

On Fri, Mar 03, 2023, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   2eb29d59ddf02e39774abfb60b2030b0b7e27c1f
> commit: 7cb79f433e75b05d1635aefaa851cfcd1cb7dc4f KVM: PPC: Fix refactoring goof in kvmppc_e500mc_init()
> date:   5 weeks ago
> config: powerpc-randconfig-r001-20230302 (https://download.01.org/0day-ci/archive/20230303/202303031630.ntvIuYqo-lkp@intel.com/config)
> compiler: powerpc-linux-gcc (GCC) 12.1.0
> 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
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7cb79f433e75b05d1635aefaa851cfcd1cb7dc4f
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 7cb79f433e75b05d1635aefaa851cfcd1cb7dc4f
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202303031630.ntvIuYqo-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
> >> arch/powerpc/kvm/e500mc.c:171:5: error: no previous prototype for 'kvmppc_e500mc_check_processor_compat' [-Werror=missing-prototypes]
>      171 | int kvmppc_e500mc_check_processor_compat(void)
>          |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>    cc1: all warnings being treated as errors
> 
> 
> vim +/kvmppc_e500mc_check_processor_compat +171 arch/powerpc/kvm/e500mc.c
> 
>    170	
>  > 171	int kvmppc_e500mc_check_processor_compat(void)

Gah, should be "static".  I'll send a patch.