SIOCPARM_MASK     118 include/linux/soundcard.h #define	_SIOR(x,y,t)	((int)(SIOC_OUT|((sizeof(t)&SIOCPARM_MASK)<<16)|(x<<8)|y))
SIOCPARM_MASK     119 include/linux/soundcard.h #define	_SIOW(x,y,t)	((int)(SIOC_IN|((sizeof(t)&SIOCPARM_MASK)<<16)|(x<<8)|y))
SIOCPARM_MASK     121 include/linux/soundcard.h #define	_SIOWR(x,y,t)	((int)(SIOC_INOUT|((sizeof(t)&SIOCPARM_MASK)<<16)|(x<<8)|y))
SIOCPARM_MASK     122 include/linux/soundcard.h #define _SIOC_SIZE(x)	((x>>16)&SIOCPARM_MASK)