_IOC_DIRSHIFT      29 arch/alpha/include/uapi/asm/ioctl.h #define _IOC_DIRSHIFT	(_IOC_SIZESHIFT+_IOC_SIZEBITS)
_IOC_DIRSHIFT      33 arch/sparc/include/uapi/asm/ioctl.h #define _IOC_DIRSHIFT    (_IOC_SIZESHIFT + _IOC_SIZEBITS)
_IOC_DIRSHIFT      47 include/uapi/asm-generic/ioctl.h #define _IOC_DIRSHIFT	(_IOC_SIZESHIFT+_IOC_SIZEBITS)