VGT_BUSY_NO_DMA   852 drivers/gpu/drm/radeon/evergreend.h #define		VGT_BUSY_NO_DMA					(1 << 16)
VGT_BUSY_NO_DMA   252 drivers/gpu/drm/radeon/nid.h #define		VGT_BUSY_NO_DMA					(1 << 16)