From 3b994db74b75551d5ab6cc3df5d3b51d3347032b Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Fri, 8 Apr 2022 17:25:13 -0700
Subject: Use stub inline functions for no-op versions of tcp_fastopen*().

Inline functions "use" variables passed as arguments unlike empty
macros appeasing compiler warnings about unused variables.
---
 sys/netinet/tcp_fastopen.h | 51 ++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 43 insertions(+), 8 deletions(-)

diff --git a/sys/netinet/tcp_fastopen.h b/sys/netinet/tcp_fastopen.h
index 5db10b00df48..f00bc87644f9 100644
--- a/sys/netinet/tcp_fastopen.h
+++ b/sys/netinet/tcp_fastopen.h
@@ -93,14 +93,49 @@ void	tcp_fastopen_disable_path(struct tcpcb *);
 void	tcp_fastopen_update_cache(struct tcpcb *, uint16_t, uint8_t,
 	    uint8_t *);
 #else
-#define tcp_fastopen_init()			((void)0)
-#define tcp_fastopen_destroy()			((void)0)
-#define tcp_fastopen_alloc_counter()		NULL
-#define tcp_fastopen_decrement_counter(c)	((void)0)
-#define tcp_fastopen_check_cookie(i, c, l, lc)	(-1)
-#define tcp_fastopen_connect(t)			((void)0)
-#define tcp_fastopen_disable_path(t)		((void)0)
-#define tcp_fastopen_update_cache(t, m, l, c)	((void)0)
+static __inline void
+tcp_fastopen_init(void)
+{
+}
+
+static __inline void
+tcp_fastopen_destroy(void)
+{
+}
+
+static __inline unsigned int *
+tcp_fastopen_alloc_counter(void)
+{
+	return (NULL);
+}
+
+static __inline void
+tcp_fastopen_decrement_counter(unsigned int *_counter)
+{
+}
+
+static __inline int
+tcp_fastopen_check_cookie(struct in_conninfo *_inc, uint8_t *_cookie,
+    unsigned int _len, uint64_t *_latest_cookie)
+{
+	return (-1);
+}
+
+static __inline void
+tcp_fastopen_connect(struct tcpcb *_tp)
+{
+}
+
+static __inline void
+tcp_fastopen_disable_path(struct tcpcb *_tp)
+{
+}
+
+static __inline void
+tcp_fastopen_update_cache(struct tcpcb *_tp, uint16_t _mss, uint8_t _cookie_len,
+    uint8_t *_cookie)
+{
+}
 #endif /* TCP_RFC7413 */
 
 #endif /* _KERNEL */
-- 
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