_LINUX_IOC_SIZESHIFT   53 compat/linux/linux_ioctl.h #define	_LINUX_IOC_DIRSHIFT	(_LINUX_IOC_SIZESHIFT + _LINUX_IOC_SIZEBITS)
_LINUX_IOC_SIZESHIFT   58 compat/linux/linux_ioctl.h 	 ((size) << _LINUX_IOC_SIZESHIFT) |	\
_LINUX_IOC_SIZESHIFT   77 compat/linux/linux_ioctl.h 	(((nr) >> _LINUX_IOC_SIZESHIFT) & _LINUX_IOC_SIZEMASK)