_IOC_TYPECHECK     77 include/uapi/asm-generic/ioctl.h #define _IOR(type,nr,size)	_IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))
_IOC_TYPECHECK     78 include/uapi/asm-generic/ioctl.h #define _IOW(type,nr,size)	_IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
_IOC_TYPECHECK     79 include/uapi/asm-generic/ioctl.h #define _IOWR(type,nr,size)	_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))