slirp_user_read    30 arch/um/drivers/slirp.h extern int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri);
slirp_user_read    54 arch/um/drivers/slirp_kern.c 	return slirp_user_read(fd, skb_mac_header(skb), skb->dev->mtu,