Symbol: _IOR
stand/kboot/include/arch/powerpc64/termios_arch.h
186
#define _IOR(a,b,c) _IOC(_IOC_READ,(a),(b),sizeof(c))
sys/sys/ioccom.h
63
#define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))