GRA_FF_UNDERFLOW_MASK  758 drivers/video/fbdev/mmp/hw/mmp_ctrl.h #define	 GRA_FF_UNDERFLOW_MASK		0x02000000
GRA_FF_UNDERFLOW_MASK  448 drivers/video/fbdev/pxa168fb.h #define     GRA_FF_UNDERFLOW_MASK		0x02000000