netdev - [PATCH net-next 3/8] ipv6: use __skb_push() in ip6

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Message-ID: <20260130210303.3888261-4-edumazet@google.com>
Date: Fri, 30 Jan 2026 21:02:58 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>
Cc: Simon Horman <horms@...nel.org>, David Ahern <dsahern@...nel.org>, 
	Kuniyuki Iwashima <kuniyu@...gle.com>, netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 3/8] ipv6: use __skb_push() in ip6_xmit()

ip6_xmit() makes sure there is enough headroom in the skb,
it can uses __skb_push() instead of the out-of-line skb_push().

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 net/ipv6/ip6_output.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 5c2cfcc3cf6e56192123c5830250865d37e72581..279d4daa85c442eb3db8add1d97c57c1ffbe820f 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -314,7 +314,7 @@ int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	}
 
 	if (unlikely(seg_len > IPV6_MAXPLEN)) {
-		hop_jumbo = skb_push(skb, hoplen);
+		hop_jumbo = __skb_push(skb, hoplen);
 
 		hop_jumbo->nexthdr = proto;
 		hop_jumbo->hdrlen = 0;
@@ -327,7 +327,7 @@ int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 		IP6CB(skb)->flags |= IP6SKB_FAKEJUMBO;
 	}
 
-	skb_push(skb, sizeof(struct ipv6hdr));
+	__skb_push(skb, sizeof(struct ipv6hdr));
 	skb_reset_network_header(skb);
 	hdr = ipv6_hdr(skb);
 
-- 
2.53.0.rc1.225.gd81095ad13-goog