Hi Kyle,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.8-rc6]
[cannot apply to tip/x86/core next-20160914]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url:    https://github.com/0day-ci/linux/commits/Kyle-Huey/syscalls-x86-Expose-arch_prctl-on-x86-32/20160915-052851
config: um-i386_defconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        # save the attached .config to linux build tree
        make ARCH=um SUBARCH=i386

All errors (new ones prefixed by >>):

>> arch/x86/um/built-in.o:(.rodata+0x6b0): undefined reference to `sys_arch_prctl'
   collect2: error: ld returned 1 exit status

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