SIOCGIFMTU        543 fs/compat_ioctl.c 		case SIOCGIFMTU:
SIOCGIFMTU       2544 fs/compat_ioctl.c HANDLE_IOCTL(SIOCGIFMTU, dev_ifsioc)
SIOCGIFMTU       3522 net/core/dev.c 		case SIOCGIFMTU:	/* Get the MTU of a device */
SIOCGIFMTU       3730 net/core/dev.c 		case SIOCGIFMTU: