tag	line	file	source code
_IOC_SIZEBITS	22	include/asm-alpha/ioctl.h	#define _IOC_SIZEMASK  ((1 << _IOC_SIZEBITS)-1)
_IOC_SIZEBITS	28	include/asm-alpha/ioctl.h	#define _IOC_DIRSHIFT  (_IOC_SIZESHIFT+_IOC_SIZEBITS)