From: Kuniyuki Iwashima <kuniyu@google.com>
Date: Wed, 29 Oct 2025 17:32:56 +0000 (+0000)
Subject: ipv6: Add in6_dev_rcu().
X-Git-Tag: v6.19-rc1~170^2~253^2~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d8f9581e1b7f1fe2e1ac985f4ea508d044c90733;p=thirdparty%2Fkernel%2Flinux.git

ipv6: Add in6_dev_rcu().

rcu_dereference_rtnl() does not clearly tell whether the caller
is under RCU or RTNL.

Let's add in6_dev_rcu() to make it easy to remove __in6_dev_get()
in the future.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Link: https://patch.msgid.link/20251029173344.2934622-5-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 9e5e95988b9e5..78e8b877fb257 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -347,6 +347,11 @@ static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev)
 	return rcu_dereference_rtnl(dev->ip6_ptr);
 }
 
+static inline struct inet6_dev *in6_dev_rcu(const struct net_device *dev)
+{
+	return rcu_dereference(dev->ip6_ptr);
+}
+
 static inline struct inet6_dev *__in6_dev_get_rtnl_net(const struct net_device *dev)
 {
 	return rtnl_net_dereference(dev_net(dev), dev->ip6_ptr);