tag	line	file	source code
IOC_OUT	23	include/linux/ioctl.h	#define IOC_INOUT  (IOC_IN | IOC_OUT)  /* both */
IOC_OUT	46	include/linux/ioctl.h	#define _IOR(c,d,t)  (IOC_OUT | ((sizeof(t)<<16) & IOCSIZE_MASK) | \
IOC_OUT	80	include/linux/soundcard.h	#define  IOC_INOUT  (IOC_IN|IOC_OUT)
IOC_OUT	83	include/linux/soundcard.h	#define  _IOR(x,y,t)  ((int)(IOC_OUT|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y))