IF_WRITEBUF      2052 drivers/staging/isdn/gigaset/bas-gigaset.c 	return IF_WRITEBUF;
IF_WRITEBUF       279 drivers/staging/isdn/gigaset/ser-gigaset.c 	return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;
IF_WRITEBUF       523 drivers/staging/isdn/gigaset/usb-gigaset.c 	return bytes < IF_WRITEBUF ? IF_WRITEBUF - bytes : 0;