dasd_ioctl 3394 drivers/s390/block/dasd.c .ioctl = dasd_ioctl, dasd_ioctl 3395 drivers/s390/block/dasd.c .compat_ioctl = dasd_ioctl, dasd_ioctl 847 drivers/s390/block/dasd_int.h int dasd_ioctl(struct block_device *, fmode_t, unsigned int, unsigned long);