Hi Andrew, It's probably a bug fix that unveils the link errors. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 8f8ab14f4414e1be0e7c23036017e3e3130ba7cd commit: 2ef5da008877ad2222e9a8964d39cf50fd2236d7 [5963/5971] x86-atomic-move-__atomic_add_unless-out-of-line-fix config: um-alldefconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: git checkout 2ef5da008877ad2222e9a8964d39cf50fd2236d7 # save the attached .config to linux build tree make ARCH=um All errors (new ones prefixed by >>): kernel/built-in.o: In function `get_task_cred': (.text+0x23d34): undefined reference to `__arch_atomic_add_unless' kernel/built-in.o: In function `atomic_dec_and_mutex_lock': (.text+0x2f166): undefined reference to `__arch_atomic_add_unless' kernel/built-in.o: In function `get_pi_state': >> futex.c:(.text+0x4b1c1): undefined reference to `__arch_atomic_add_unless' kernel/built-in.o: In function `get_futex_key': futex.c:(.text+0x4ba2a): undefined reference to `__arch_atomic_add_unless' mm/built-in.o: In function `oom_reaper': >> oom_kill.c:(.text+0x4b36): undefined reference to `__arch_atomic_add_unless' mm/built-in.o:(.text+0x10e01): more undefined references to `__arch_atomic_add_unless' follow collect2: error: ld returned 1 exit status --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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