RREG32_IO        1106 drivers/gpu/drm/amd/amdgpu/amdgpu.h #define RREG32_IO(reg) amdgpu_io_rreg(adev, (reg))
RREG32_IO        2566 drivers/gpu/drm/radeon/radeon.h #define RREG32_IO(reg) r100_io_rreg(rdev, (reg))