[drm:drm-next 990/1014] ./usr/include/drm/amdgpu_drm.h:38: userspace cannot reference function or variable defined in the kernel

[kbuild test robot]

tree:   git://people.freedesktop.org/~airlied/linux.git drm-next
head:   7c10ddf87472c07eabc206e273dc59f77c700858
commit: cfa7152f1cfeedba7c4ab3abcb4accee94cc2c0f [990/1014] drm/amdgpu: add extern C guard for the UAPI header
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        git checkout cfa7152f1cfeedba7c4ab3abcb4accee94cc2c0f
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

>> ./usr/include/drm/amdgpu_drm.h:38: userspace cannot reference function or variable defined in the kernel

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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