[linux-next:master 4867/4874] collect2: error: ld returned 1 exit status

[linux-next:master 4867/4874] collect2: error: ld returned 1 exit status

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   6ec9c2f12955a217a0b7c1512fc7d889024e15b3
commit: 0bbf6111d7722a445033577e642cce85e20410bd [4867/4874] x86-atomic-move-__atomic_add_unless-out-of-line-fix
config: um-x86_64_defconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout 0bbf6111d7722a445033577e642cce85e20410bd
        # save the attached .config to linux build tree
        make ARCH=um SUBARCH=x86_64

All errors (new ones prefixed by >>):

   kernel/built-in.o: In function `__atomic_add_unless':
   include/asm-generic/atomic-instrumented.h:70: undefined reference to `__arch_atomic_add_unless'
   include/asm-generic/atomic-instrumented.h:70: undefined reference to `__arch_atomic_add_unless'
   include/asm-generic/atomic-instrumented.h:70: undefined reference to `__arch_atomic_add_unless'
   include/asm-generic/atomic-instrumented.h:70: undefined reference to `__arch_atomic_add_unless'
   include/asm-generic/atomic-instrumented.h:70: undefined reference to `__arch_atomic_add_unless'
   mm/built-in.o:include/asm-generic/atomic-instrumented.h:70: more undefined references to `__arch_atomic_add_unless' follow
>> collect2: error: ld returned 1 exit status

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