r420_mc_wreg      108 drivers/gpu/drm/radeon/radeon_asic.c 		rdev->mc_wreg = &r420_mc_wreg;
r420_mc_wreg      201 drivers/gpu/drm/radeon/radeon_asic.h extern void r420_mc_wreg(struct radeon_device *rdev, u32 reg, u32 v);