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

[kernel test robot]

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: i386-randconfig-a001 (https://download.01.org/0day-ci/archive/20230427/202304271446.dk8ruOnO-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build):
        # 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
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kernel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202304271446.dk8ruOnO-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/nmi.c:441:6: warning: no previous prototype for 'set_nmi_torture' [-Wmissing-prototypes]
     441 | void set_nmi_torture(int nmi_delay_in, bool nmi_halt1_in, bool nmi_halt2_in, bool nmi_halt3_in)
         |      ^~~~~~~~~~~~~~~


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	

-- 
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https://github.com/intel/lkp-tests