net: Rename ->stream_memory_read to ->sock_is_readable

The proto ops ->stream_memory_read() is currently only used
by TCP to check whether psock queue is empty or not. We need
to rename it before reusing it for non-TCP protocols, and
adjust the exsiting users accordingly.

Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211008203306.37525-2-xiyou.wangcong@gmail.com
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 4feb95e..d5d09bd 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -2026,7 +2026,7 @@ ssize_t tls_sw_splice_read(struct socket *sock,  loff_t *ppos,
 	return copied ? : err;
 }
 
-bool tls_sw_stream_read(const struct sock *sk)
+bool tls_sw_sock_is_readable(struct sock *sk)
 {
 	struct tls_context *tls_ctx = tls_get_ctx(sk);
 	struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);