tcp: uninline tcp_stream_memory_free()

Both IPv4 and IPv6 needs it via a function pointer.
Following patch will avoid the indirect call.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 1 insertions, 12 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 4aba0f069b05d..d643ee4e42495 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1965,18 +1965,7 @@ static inline u32 tcp_notsent_lowat(const struct tcp_sock *tp)
 	return tp->notsent_lowat ?: net->ipv4.sysctl_tcp_notsent_lowat;
 }
 
-/* @wake is one when sk_stream_write_space() calls us.
- * This sends EPOLLOUT only if notsent_bytes is half the limit.
- * This mimics the strategy used in sock_def_write_space().
- */
-static inline bool tcp_stream_memory_free(const struct sock *sk, int wake)
-{
-	const struct tcp_sock *tp = tcp_sk(sk);
-	u32 notsent_bytes = READ_ONCE(tp->write_seq) -
-			    READ_ONCE(tp->snd_nxt);
-
-	return (notsent_bytes << wake) < tcp_notsent_lowat(tp);
-}
+bool tcp_stream_memory_free(const struct sock *sk, int wake);
 
 #ifdef CONFIG_PROC_FS
 int tcp4_proc_init(void);