Hi Li,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/sched/core]
[also build test ERROR on vhost/linux-next v5.14-rc2 next-20210722]
[cannot apply to kvm/queue]
[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]

url:    https://github.com/0day-ci/linux/commits/Li-RongQing/KVM-Consider-SMT-idle-status-when-halt-polling/20210722-120700
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 031e3bd8986fffe31e1ddbf5264cccfe30c9abd7
config: x86_64-kexec (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/df205655d183524ffe8547bcc0f230a6f3217566
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Li-RongQing/KVM-Consider-SMT-idle-status-when-halt-polling/20210722-120700
        git checkout df205655d183524ffe8547bcc0f230a6f3217566
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

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

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "idle_cpu" [arch/x86/kvm/kvm.ko] undefined!

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org