Hi Thomas,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cd4175b11685b11c40e31a03e05084cc212b0649
commit: d3488649dcd23b7a6e63895274ec69f80e92d4ed um: Fix CONFIG_GCOV for modules.
date:   10 days ago
config: um-allyesconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout d3488649dcd23b7a6e63895274ec69f80e92d4ed
        # save the attached .config to linux build tree
        make ARCH=um 

All errors (new ones prefixed by >>):

   kernel/gcov/base.o: In function `__crc___gcov_merge_add':
>> (*ABS*+0xbb29b267): multiple definition of `__crc___gcov_merge_add'
   kernel/gcov/base.o: In function `__crc___gcov_init':
>> (*ABS*+0xdceb3072): multiple definition of `__crc___gcov_init'

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