ACK_FLUSH_CTL    1017 drivers/gpu/drm/radeon/evergreend.h #define		ACK_FLUSH_CTL(x)				((x) << 6)
ACK_FLUSH_CTL     480 drivers/gpu/drm/radeon/nid.h #define		ACK_FLUSH_CTL(x)				((x) << 6)
ACK_FLUSH_CTL     520 drivers/gpu/drm/radeon/rv770d.h #define		ACK_FLUSH_CTL(x)				((x) << 6)