From: Eric Dumazet <edumazet@google.com>
Date: Fri, 30 Jan 2026 21:02:58 +0000 (+0000)
Subject: ipv6: use __skb_push() in ip6_xmit()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5b1b676a30bfa045755cd7d8c782b9b498dac0d;p=thirdparty%2Fkernel%2Flinux.git

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@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260130210303.3888261-4-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 5c2cfcc3cf6e..279d4daa85c4 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);