sscape_bootblock   18 include/sound/sscape_ioctl.h #define SND_SSCAPE_LOAD_BOOTB  _IOWR('P', 100, struct sscape_bootblock)
sscape_bootblock  676 sound/isa/sscape.c 			register struct sscape_bootblock __user *bb = (struct sscape_bootblock __user *) arg;