netdev - [PATCH net-next 1/3] ipv6: remove leftover ip6 cookie initializer

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Message-ID: <20250307033620.411611-2-willemdebruijn.kernel@gmail.com>
Date: Thu,  6 Mar 2025 22:34:08 -0500
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	dsahern@...nel.org,
	horms@...nel.org,
	Willem de Bruijn <willemb@...gle.com>
Subject: [PATCH net-next 1/3] ipv6: remove leftover ip6 cookie initializer

From: Willem de Bruijn <willemb@...gle.com>

As of the blamed commit ipc6.dontfrag is always initialized at the
start of udpv6_sendmsg, by ipcm6_init_sk, to either 0 or 1.

Later checks against -1 are no longer needed and the branches are now
dead code.

The blamed commit had removed those branches. But I had overlooked
this one case.

UDP has both a lockless fast path and a slower path for corked
requests. This branch remained in the fast path.

Fixes: 096208592b09 ("ipv6: replace ipcm6_init calls with ipcm6_init_sk")
Signed-off-by: Willem de Bruijn <willemb@...gle.com>
---
 net/ipv6/ip6_output.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index d577bf2f3053..d91da522c34e 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -2054,8 +2054,6 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
 		ip6_cork_release(cork, &v6_cork);
 		return ERR_PTR(err);
 	}
-	if (ipc6->dontfrag < 0)
-		ipc6->dontfrag = inet6_test_bit(DONTFRAG, sk);
 
 	err = __ip6_append_data(sk, &queue, cork, &v6_cork,
 				&current->task_frag, getfrag, from,
-- 
2.49.0.rc0.332.g42c0ae87b1-goog