Hi Huacai,

I love your patch! Yet something to improve:

[auto build test ERROR on pavel-leds/for-next]
[also build test ERROR on linus/master v6.1-rc2 next-20221028]
[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/Huacai-Chen/LoongArch-Add-suspend-ACPI-S3-support/20221028-104234
base:   git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next
patch link:    https://lore.kernel.org/r/20221028023829.4030984-2-chenhuacai%40loongson.cn
patch subject: [PATCH 2/2] LoongArch: Add hibernation (ACPI S4) support
config: loongarch-allnoconfig
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://github.com/intel-lab-lkp/linux/commit/49ada2ab12c9a56d08865ddfc91413242369c1b8
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Huacai-Chen/LoongArch-Add-suspend-ACPI-S3-support/20221028-104234
        git checkout 49ada2ab12c9a56d08865ddfc91413242369c1b8
        # 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

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

All errors (new ones prefixed by >>):

   loongarch64-linux-ld: arch/loongarch/kernel/reset.o: in function `machine_power_off':
>> reset.c:(.text+0x54): undefined reference to `enable_pci_wakeup'

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