taglinefilesource code
_IOW48include/asm-alpha/ioctl.h#define _IOW(type,nr,size)  _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
_IOW58include/asm-i386/ioctl.h#define _IOW(type,nr,size)  _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
_IOW43include/asm-ppc/ioctl.h#define _IOW(type,nr,size)  _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
_IOW35include/asm-sparc/ioctl.h#define _IOW(type,nr,size)  _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
_IOW105include/linux/soundcard.h#define  _IOW(x,y,t)  ((int)(IOC_IN|((sizeof(t)&IOCPARM_MASK)<<16)|(x<<8)|y))