[rcu:dev.2019.04.04a 35/54] amdgpu_amdkfd.c:(.text.amdgpu_amdkfd_init+0x2c): undefined reference to `kfd_processes_srcu'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2019.04.04a
head:   6f1d86fa5cd6dc95118310607a6bc6f3c6e3092a
commit: 07366215c9b454bb6ee5648e18ee91a5c4fd0ea6 [35/54] drivers/gpu/drm/amd: Dynamically allocate kfd_processes_srcu
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 07366215c9b454bb6ee5648e18ee91a5c4fd0ea6
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.o: In function `amdgpu_amdkfd_init':
>> amdgpu_amdkfd.c:(.text.amdgpu_amdkfd_init+0x2c): undefined reference to `kfd_processes_srcu'
   amdgpu_amdkfd.c:(.text.amdgpu_amdkfd_init+0x38): undefined reference to `kfd_processes_srcu'
   drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.o: In function `amdgpu_amdkfd_fini':
>> amdgpu_amdkfd.c:(.text.amdgpu_amdkfd_fini+0x10): undefined reference to `kfd_processes_srcu'
   amdgpu_amdkfd.c:(.text.amdgpu_amdkfd_fini+0x18): undefined reference to `kfd_processes_srcu'

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