_IOC_NRBITS        16 arch/alpha/include/uapi/asm/ioctl.h #define _IOC_NRBITS	8
_IOC_NRBITS        19 arch/sparc/include/uapi/asm/ioctl.h #define _IOC_NRBITS      8
_IOC_NRBITS        23 include/uapi/asm-generic/ioctl.h #define _IOC_NRBITS	8