From: Eric Dumazet <edumazet@google.com>
Date: Fri, 13 Nov 2020 15:08:09 +0000 (-0800)
Subject: tcp: avoid indirect call to tcp_stream_memory_free()
X-Git-Tag: accepted/tizen/unified/20230118.172025~8321^2~254^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1c5f2ced136a7196c41ca2c16b8c2646e9b042ce;p=platform%2Fkernel%2Flinux-rpi.git

tcp: avoid indirect call to tcp_stream_memory_free()

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

diff --git a/include/net/sock.h b/include/net/sock.h
index a5c6ae7..1d29aea 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -60,7 +60,7 @@
 #include <linux/rculist_nulls.h>
 #include <linux/poll.h>
 #include <linux/sockptr.h>
-
+#include <linux/indirect_call_wrapper.h>
 #include <linux/atomic.h>
 #include <linux/refcount.h>
 #include <net/dst.h>
@@ -1264,13 +1264,17 @@ static inline void sk_refcnt_debug_release(const struct sock *sk)
 #define sk_refcnt_debug_release(sk) do { } while (0)
 #endif /* SOCK_REFCNT_DEBUG */
 
+INDIRECT_CALLABLE_DECLARE(bool tcp_stream_memory_free(const struct sock *sk, int wake));
+
 static inline bool __sk_stream_memory_free(const struct sock *sk, int wake)
 {
 	if (READ_ONCE(sk->sk_wmem_queued) >= READ_ONCE(sk->sk_sndbuf))
 		return false;
 
 	return sk->sk_prot->stream_memory_free ?
-		sk->sk_prot->stream_memory_free(sk, wake) : true;
+		INDIRECT_CALL_1(sk->sk_prot->stream_memory_free,
+			        tcp_stream_memory_free,
+				sk, wake) : true;
 }
 
 static inline bool sk_stream_memory_free(const struct sock *sk)