[rcu:rcu/next 59/91] tree.c:(.text+0x4248): multiple definition of `srcu_online_cpu'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head:   87c458e6304c6a1b37bf856e88c70fc37f08851f
commit: da915ad5cf25b5f5d358dd3670c3378d8ae8c03e [59/91] srcu: Parallelize callback handling
config: tile-allnoconfig (attached as .config)
compiler: tilegx-linux-gcc (GCC) 4.6.2
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout da915ad5cf25b5f5d358dd3670c3378d8ae8c03e
        # save the attached .config to linux build tree
        make.cross ARCH=tile 

All errors (new ones prefixed by >>):

   kernel/rcu/tree.o: In function `srcu_online_cpu':
>> tree.c:(.text+0x4248): multiple definition of `srcu_online_cpu'
   kernel/rcu/srcutree.o:srcutree.c:(.text+0x2120): first defined here
   kernel/rcu/tree.o: In function `srcu_offline_cpu':
>> tree.c:(.text+0x4250): multiple definition of `srcu_offline_cpu'
   kernel/rcu/srcutree.o:srcutree.c:(.text+0x2160): first defined here

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