_IOC_TYPEBITS      17 arch/alpha/include/uapi/asm/ioctl.h #define _IOC_TYPEBITS	8
_IOC_TYPEBITS      20 arch/sparc/include/uapi/asm/ioctl.h #define _IOC_TYPEBITS    8
_IOC_TYPEBITS      24 include/uapi/asm-generic/ioctl.h #define _IOC_TYPEBITS	8