3.7+ kernels and Radeon HD 4250 backlight

[Sergey Korshunoff]

Hi!
I have problems running android-x86 (32 bit, 4.0-r1) with kernel 3.10
64 bit. Android drivers (binder and ashmem) are modified for this mode
(no problems). Problem is with radeon fb. Function radeon_iocl() is
failed on line: DRM_ERROR("copy_to_user %s:%u\n", __func__, __LINE__)
on request RADEON_INFO_TILING_CONFIG. Looks like pointer to userspace
is wrong.