RING_TAIL_MASK   1580 drivers/video/fbdev/intelfb/intelfbhw.c 	dinfo->ring_tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;
RING_TAIL_MASK    554 drivers/video/fbdev/intelfb/intelfbhw.h 		tail = INREG(PRI_RING_TAIL) & RING_TAIL_MASK;		\