linux-kernel - [PATCH net] net: add inline annotation to fix the build warning

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Message-ID: <20240919142149.282175-1-yyyynoom@gmail.com>
Date: Thu, 19 Sep 2024 23:21:49 +0900
From: Moon Yeounsu <yyyynoom@...il.com>
To: davem@...emloft.net,
	dsahern@...nel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.org
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Moon Yeounsu <yyyynoom@...il.com>
Subject: [PATCH net] net: add inline annotation to fix the build warning

This patch fixes two sparse warnings (`make C=1`):
net/ipv6/icmp.c:103:20: warning: context imbalance in 'icmpv6_xmit_lock' - wrong count at exit
net/ipv6/icmp.c:119:13: warning: context imbalance in 'icmpv6_xmit_unlock' - unexpected unlock

Since `icmp6_xmit_lock()` and `icmp6_xmit_unlock()` are designed as they
are named, entering/returning the function without lock/unlock doesn't
matter.

Signed-off-by: Moon Yeounsu <yyyynoom@...il.com>
---
 net/ipv6/icmp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 071b0bc1179d..d8cc3d63c942 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -101,6 +101,7 @@ static const struct inet6_protocol icmpv6_protocol = {
 
 /* Called with BH disabled */
 static struct sock *icmpv6_xmit_lock(struct net *net)
+	__acquires(&sk->sk_lock.slock)
 {
 	struct sock *sk;
 
@@ -117,6 +118,7 @@ static struct sock *icmpv6_xmit_lock(struct net *net)
 }
 
 static void icmpv6_xmit_unlock(struct sock *sk)
+	__releases(&sk->sk_lock.slock)
 {
 	sock_net_set(sk, &init_net);
 	spin_unlock(&sk->sk_lock.slock);
-- 
2.46.1