On 2020/3/25 上午10:25, kbuild test robot wrote:

I love your patch! Yet something to improve:

[auto build test ERROR on vhost/linux-next]
[also build test ERROR on linux/master linus/master v5.6-rc7 next-20200324]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please seehttps://stackoverflow.com/a/37406982]

url:https://github.com/0day-ci/linux/commits/Jason-Wang/vDPA-support/20200324-142634
base:https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git  linux-next
config: m68k-allyesconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.2.0
reproduce:
         wgethttps://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross  -O ~/bin/make.cross
         chmod +x ~/bin/make.cross
         # save the attached .config to linux build tree
         GCC_VERSION=9.2.0 make.cross ARCH=m68k

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot<redacted>

All errors (new ones prefixed by >>):

This is because VDPA_SIM selects VHOST_RING which selects VHOST_IOTLB 
which depends on VIRTULAIZATION but not defined in m68k.

I think we should refine the vhost Kconfig and decouple it out of 
VIRTUALIZATION.

Will send a new series with this shortly.

Thanks