_IOC_SIZEBITS      18 arch/alpha/include/uapi/asm/ioctl.h #define _IOC_SIZEBITS	13
_IOC_SIZEBITS      14 arch/mips/include/uapi/asm/ioctl.h #define _IOC_SIZEBITS	13
_IOC_SIZEBITS       5 arch/powerpc/include/uapi/asm/ioctl.h #define _IOC_SIZEBITS	13
_IOC_SIZEBITS      21 arch/sparc/include/uapi/asm/ioctl.h #define _IOC_SIZEBITS   13	/* Actually 14, see below. */
_IOC_SIZEBITS      32 include/uapi/asm-generic/ioctl.h # define _IOC_SIZEBITS	14