sclp_ctl_sccb 23 arch/s390/include/uapi/asm/sclp_ctl.h _IOWR(SCLP_CTL_IOCTL_MAGIC, 0x10, struct sclp_ctl_sccb) sclp_ctl_sccb 57 drivers/s390/char/sclp_ctl.c struct sclp_ctl_sccb ctl_sccb;