linux-kernel - [paulmck-rcu:dev.2023.04.26a 38/51] arch/x86/kernel/nmi.c:441:6: warning: no previous prototype for function 'set_nmi

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Message-ID: <202304271448.5uG6ip4V-lkp@intel.com>
Date:   Thu, 27 Apr 2023 14:48:06 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [paulmck-rcu:dev.2023.04.26a 38/51] arch/x86/kernel/nmi.c:441:6:
 warning: no previous prototype for function 'set_nmi_torture'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2023.04.26a
head:   56b38a90a12f76e463a7381d8cff854926fa2b59
commit: e5bf47f3a53ddfad8e0c56b6cbf048de8d82b033 [38/51] x86/nmi: Add a set_nmi_torture() function to control NMI testing
config: x86_64-randconfig-a005 (https://download.01.org/0day-ci/archive/20230427/202304271448.5uG6ip4V-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/paulmck/linux-rcu.git/commit/?id=e5bf47f3a53ddfad8e0c56b6cbf048de8d82b033
        git remote add paulmck-rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
        git fetch --no-tags paulmck-rcu dev.2023.04.26a
        git checkout e5bf47f3a53ddfad8e0c56b6cbf048de8d82b033
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/

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/202304271448.5uG6ip4V-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/nmi.c:441:6: warning: no previous prototype for function 'set_nmi_torture' [-Wmissing-prototypes]
   void set_nmi_torture(int nmi_delay_in, bool nmi_halt1_in, bool nmi_halt2_in, bool nmi_halt3_in)
        ^
   arch/x86/kernel/nmi.c:441:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void set_nmi_torture(int nmi_delay_in, bool nmi_halt1_in, bool nmi_halt2_in, bool nmi_halt3_in)
   ^
   static 
   1 warning generated.


vim +/set_nmi_torture +441 arch/x86/kernel/nmi.c

   439	
   440	/* Set the test values as desired. */
 > 441	void set_nmi_torture(int nmi_delay_in, bool nmi_halt1_in, bool nmi_halt2_in, bool nmi_halt3_in)
   442	{
   443		WRITE_ONCE(nmi_delay, nmi_delay_in);
   444		WRITE_ONCE(nmi_halt1, nmi_halt1_in);
   445		WRITE_ONCE(nmi_halt2, nmi_halt2_in);
   446		WRITE_ONCE(nmi_halt3, nmi_halt3_in);
   447		pr_info("%s: Set NMI test parameters nmi_delay=%d nmi_halt1=%d nmi_halt2=%d nmi_halt3=%d\n",
   448			__func__, nmi_delay, nmi_halt1, nmi_halt2, nmi_halt3);
   449	}
   450	EXPORT_SYMBOL_GPL(set_nmi_torture);
   451	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests