[tip:x86/timers 8/14] smpboot.c:undefined reference to `check_tsc_sync_target'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/timers
head:   3a8233334695a452b4a11dde2342951f726fe449
commit: 8b223bc7abe0e30e8d297a24ee6c6c07ef8d0bb9 [8/14] x86/tsc: Store and check TSC ADJUST MSR
config: i386-randconfig-h1-11300137 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout 8b223bc7abe0e30e8d297a24ee6c6c07ef8d0bb9
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   arch/x86/built-in.o: In function `start_secondary':
>> smpboot.c:(.text+0x33027): undefined reference to `check_tsc_sync_target'
   arch/x86/built-in.o: In function `native_cpu_up':
>> (.text+0x33e74): undefined reference to `check_tsc_sync_source'

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Attachment: .config.gz
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