read_descriptor_t  333 include/linux/fs.h typedef int (*read_actor_t)(read_descriptor_t *, struct page *,
read_descriptor_t  580 include/net/tcp.h typedef int (*sk_read_actor_t)(read_descriptor_t *, struct sk_buff *,
read_descriptor_t  582 include/net/tcp.h int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,