netdev - [PATCH net-next 16/27] ipv6: partially inline fl6_update

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Date:   Sun,  3 Apr 2022 14:06:28 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Eric Dumazet <edumazet@...gle.com>, Wei Liu <wei.liu@...nel.org>,
        Paul Durrant <paul@....org>,
        Pavel Begunkov <asml.silence@...il.com>
Subject: [PATCH net-next 16/27] ipv6: partially inline fl6_update_dst()

fl6_update_dst() doesn't do anything when there are no opts passed.
Inline the null checking part.

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 include/net/ipv6.h | 15 ++++++++++++---
 net/ipv6/exthdrs.c | 15 ++++++---------
 2 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 0320bea599c9..48a25f663646 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -1114,9 +1114,18 @@ int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target,
 
 int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type);
 
-struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
-				const struct ipv6_txoptions *opt,
-				struct in6_addr *orig);
+struct in6_addr *__fl6_update_dst(struct flowi6 *fl6,
+				  const struct ipv6_txoptions *opt,
+				  struct in6_addr *orig);
+
+static inline struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
+					      const struct ipv6_txoptions *opt,
+					      struct in6_addr *orig)
+{
+	if (!opt || !opt->srcrt)
+		return NULL;
+	return __fl6_update_dst(fl6, opt, orig);
+}
 
 /*
  *	socket options (ipv6_sockglue.c)
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 658d5eabaf7e..0b37b11cd2a9 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -1365,8 +1365,8 @@ struct ipv6_txoptions *__ipv6_fixup_options(struct ipv6_txoptions *opt_space,
 EXPORT_SYMBOL_GPL(__ipv6_fixup_options);
 
 /**
- * fl6_update_dst - update flowi destination address with info given
- *                  by srcrt option, if any.
+ * __fl6_update_dst - update flowi destination address with info given
+ *                    by srcrt option.
  *
  * @fl6: flowi6 for which daddr is to be updated
  * @opt: struct ipv6_txoptions in which to look for srcrt opt
@@ -1375,13 +1375,10 @@ EXPORT_SYMBOL_GPL(__ipv6_fixup_options);
  * Returns NULL if no txoptions or no srcrt, otherwise returns orig
  * and initial value of fl6->daddr set in orig
  */
-struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
-				const struct ipv6_txoptions *opt,
-				struct in6_addr *orig)
+struct in6_addr *__fl6_update_dst(struct flowi6 *fl6,
+				  const struct ipv6_txoptions *opt,
+				  struct in6_addr *orig)
 {
-	if (!opt || !opt->srcrt)
-		return NULL;
-
 	*orig = fl6->daddr;
 
 	switch (opt->srcrt->type) {
@@ -1403,4 +1400,4 @@ struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
 
 	return orig;
 }
-EXPORT_SYMBOL_GPL(fl6_update_dst);
+EXPORT_SYMBOL_GPL(__fl6_update_dst);
-- 
2.35.1