Symbol: _IOW
stand/kboot/include/arch/powerpc64/termios_arch.h
185
#define _IOW(a,b,c) _IOC(_IOC_WRITE,(a),(b),sizeof(c))
sys/sys/ioccom.h
64
#define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))