Hi Harry,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.0-rc4 next-20190222]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Harry-Pan/PM-sleep-refactor-the-filesystems-sync-to-reduce-duplication/20190225-025843
config: i386-defconfig (attached as .config)
compiler: gcc-8 (Debian 8.2.0-20) 8.2.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   ld: kernel/power/main.o: in function `ksys_sync_helper.cold.2':
>> main.c:(.text.unlikely+0x23): undefined reference to `__moddi3'
>> ld: main.c:(.text.unlikely+0x37): undefined reference to `__divdi3'

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