tree:   git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git efi-zboot-direct
head:   c4954c4853a50dbfefd1beb56d466ab612164ae2
commit: 381bd73358536b5470c170542b37e95311b7ea45 [34/35] efi/loongarch: libstub: Split off kernel image relocation for builtin stub
config: loongarch-allyesconfig
compiler: loongarch64-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/ardb/linux.git/commit/?id=381bd73358536b5470c170542b37e95311b7ea45
        git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git
        git fetch --no-tags ardb efi-zboot-direct
        git checkout 381bd73358536b5470c170542b37e95311b7ea45
        # 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=loongarch SHELL=/bin/bash drivers/firmware/

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

All warnings (new ones prefixed by >>):

>> drivers/firmware/efi/libstub/loongarch.c:40:22: warning: no previous prototype for 'kernel_entry_offset' [-Wmissing-prototypes]
      40 | unsigned long __weak kernel_entry_offset(void)
         |                      ^~~~~~~~~~~~~~~~~~~


vim +/kernel_entry_offset +40 drivers/firmware/efi/libstub/loongarch.c

    39	
  > 40	unsigned long __weak kernel_entry_offset(void)
    41	{
    42		/* the offset to the branch-to-entrypoint instruction in the header */
    43		return 4;
    44	}
    45	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp