Linux Virtualization - Feb 2018 - [vhost:vhost 19/20] Warning: arch/x86/tools/test_get_len found difference at <pm_restore_gfp_mask>:ffffffff811aa5f0

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost
head:   96bcd04462b99e2c80e09f6537770a0ca6b288d0
commit: cc1d1dc07885803981520a5303ef5b130f2ca2e8 [19/20] mm: support reporting
free page blocks
config: x86_64-rhel
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout cc1d1dc07885803981520a5303ef5b130f2ca2e8
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

On Wed, Feb 07, 2018 at 03:02:57PM +0800, kbuild test robot
wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git vhost
> head:   96bcd04462b99e2c80e09f6537770a0ca6b288d0
> commit: cc1d1dc07885803981520a5303ef5b130f2ca2e8 [19/20] mm: support
reporting free page blocks
> config: x86_64-rhel
> compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
> reproduce:
>         git checkout cc1d1dc07885803981520a5303ef5b130f2ca2e8
>         # save the attached .config to linux build tree
>         make ARCH=x86_64 
> 
> All warnings (new ones prefixed by >>):
I'm sorry, what exactly does this mean?
> ---
> 0-DAY kernel test infrastructure                Open Source Technology
Center
> https://lists.01.org/pipermail/kbuild-all                   Intel
Corporation