[radeon-alex:drm-next-4.20-wip 320/383] amdgpu_vm.c:undefined reference to `__umoddi3'

[kbuild test robot]

tree:   git://people.freedesktop.org/~agd5f/linux.git drm-next-4.20-wip
head:   5232da2f75d903c48a23eca143c61d1ac4fd2d2c
commit: d72a6887eef880271c0d48ed427329ccc0d547f9 [320/383] drm/amdgpu: use leaf iterator for allocating PD/PT
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout d72a6887eef880271c0d48ed427329ccc0d547f9
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/amdgpu_vm.o: In function `amdgpu_vm_pt_descendant':
>> amdgpu_vm.c:(.text+0x960): undefined reference to `__umoddi3'

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