_IO                48 arch/alpha/include/uapi/asm/ioctl.h #define _IO(type,nr)		_IOC(_IOC_NONE,(type),(nr),0)
_IO                45 arch/sparc/include/uapi/asm/ioctl.h #define _IO(type,nr)        _IOC(_IOC_NONE,(type),(nr),0)
_IO                36 drivers/scsi/dpt/dpti_ioctl.h # define _IO(x,y)	(((x)<<8)|y)
_IO                85 include/uapi/asm-generic/ioctl.h #define _IO(type,nr)		_IOC(_IOC_NONE,(type),(nr),0)