Hi Uros,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/master]
[also build test ERROR on next-20201215]
[cannot apply to tip/x86/core kvm/linux-next v5.10]
[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/Uros-Bizjak/x86-KVM-VMX-Introduce-and-use-try_cmpxchg64/20201216-024049
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git d1c29f5debd4633eb0e9ea1bc00aaad48b077a9b
config: i386-tinyconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/60a11e7e63e120b5fd41b5346cf5a05ea71c7cb2
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Uros-Bizjak/x86-KVM-VMX-Introduce-and-use-try_cmpxchg64/20201216-024049
        git checkout 60a11e7e63e120b5fd41b5346cf5a05ea71c7cb2
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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 >>):

   ld: arch/x86/events/core.o: in function `x86_perf_event_update':
>> core.c:(.text+0x847): undefined reference to `cmpxchg8b_emu'
   ld: kernel/sched/clock.o: in function `sched_clock_local.constprop.0':
>> clock.c:(.text+0x1b4): undefined reference to `cmpxchg8b_emu'
   ld: kernel/sched/clock.o: in function `sched_clock_cpu':
   clock.c:(.text+0x293): undefined reference to `cmpxchg8b_emu'
>> ld: clock.c:(.text+0x2e3): undefined reference to `cmpxchg8b_emu'
   ld: kernel/events/core.o: in function `perf_swevent_set_period':
   core.c:(.text+0x8cbb): undefined reference to `cmpxchg8b_emu'
   ld: fs/inode.o:inode.c:(.text+0x10ca): more undefined references to `cmpxchg8b_emu' follow

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