Re: [PATCH v2 resend 2/3] arm64: mm: Don't defer reserve_crashkernel() with dma_force_32bit

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

Hi Kefeng,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on next-20220330]
[cannot apply to arm64/for-next/core v5.17 v5.17-rc8 v5.17-rc7 v5.17]
[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]

url:    https://github.com/intel-lab-lkp/linux/commits/Kefeng-Wang/arm64-mm-Do-not-defer-reserve_crashkernel/20220331-152839
base:    a67ba3cf9551f8c92d5ec9d7eae1aadbb9127b57
config: arm64-buildonly-randconfig-r001-20220331 (https://download.01.org/0day-ci/archive/20220401/202204010040.RUk6NuNS-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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://github.com/intel-lab-lkp/linux/commit/970ec526bd69287a4eb9838600aaf66c46fde350
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Kefeng-Wang/arm64-mm-Do-not-defer-reserve_crashkernel/20220331-152839
        git checkout 970ec526bd69287a4eb9838600aaf66c46fde350
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/mm/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/arm64/mm/init.c:108:13: warning: no previous prototype for 'crashkernel_could_early_reserve' [-Wmissing-prototypes]
     108 | bool __init crashkernel_could_early_reserve(void)
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/crashkernel_could_early_reserve +108 arch/arm64/mm/init.c

   107	
 > 108	bool __init crashkernel_could_early_reserve(void)
   109	{
   110		if (!IS_ENABLED(CONFIG_ZONE_DMA))
   111			return true;
   112		if (arm64_dma_force_32bit)
   113			return true;
   114		return false;
   115	}
   116	

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