Re: [PATCH v10 4/6] arm64: smp: Add arch support for backtrace using pseudo-NMI

[kernel test robot <lkp@intel.com>]

Hi Douglas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on arm64/for-next/core]
[also build test WARNING on tip/irq/core arm-perf/for-next/perf linus/master v6.5-rc7 next-20230823]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Douglas-Anderson/irqchip-gic-v3-Enable-support-for-SGIs-to-act-as-NMIs/20230823-053216
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
patch link:    https://lore.kernel.org/r/20230822142644.v10.4.Ie6c132b96ebbbcddbf6954b9469ed40a6960343c%40changeid
patch subject: [PATCH v10 4/6] arm64: smp: Add arch support for backtrace using pseudo-NMI
config: arm64-randconfig-r026-20230823 (https://download.01.org/0day-ci/archive/20230824/202308240309.hI0bjoys-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230824/202308240309.hI0bjoys-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308240309.hI0bjoys-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm64/kernel/smp.c:855:6: warning: no previous prototype for 'arm64_backtrace_ipi' [-Wmissing-prototypes]
     855 | void arm64_backtrace_ipi(cpumask_t *mask)
         |      ^~~~~~~~~~~~~~~~~~~


vim +/arm64_backtrace_ipi +855 arch/arm64/kernel/smp.c

   854	
 > 855	void arm64_backtrace_ipi(cpumask_t *mask)
   856	{
   857		__ipi_send_mask(ipi_desc[IPI_CPU_BACKTRACE], mask);
   858	}
   859	

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