Subject: [PATCH net-next 6/8] netconsole: move push_udp() from netpoll

From: Breno Leitao <[email-masked]>
Date: Fri, 08 May 2026 06:29:20 -0700

push_udp() builds the UDP header (and triggers the checksum) for
netconsole's UDP packets. Move it into drivers/net/netconsole.c as
a file-static helper; drop its EXPORT_SYMBOL_GPL and remove the
prototype from include/linux/netpoll.h.

push_udp() was the last udp_hdr() consumer in net/core/netpoll.c,
so swap <net/udp.h> for <linux/udp.h> there: MAX_SKB_SIZE still
needs struct udphdr.

Signed-off-by: Breno Leitao <[email-masked]>
---
 drivers/net/netconsole.c | 18 ++++++++++++++++++
 include/linux/netpoll.h  |  1 -
 net/core/netpoll.c       | 21 +--------------------
 3 files changed, 19 insertions(+), 21 deletions(-)

diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index bcedc161b13ec..e8d96e482fe05 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -1652,6 +1652,24 @@ static struct notifier_block netconsole_netdev_notifier = {
 	.notifier_call  = netconsole_netdev_event,
 };
 
+static void push_udp(struct netpoll *np, struct sk_buff *skb, int len)
+{
+	struct udphdr *udph;
+	int udp_len;
+
+	udp_len = len + sizeof(struct udphdr);
+
+	skb_push(skb, sizeof(struct udphdr));
+	skb_reset_transport_header(skb);
+
+	udph = udp_hdr(skb);
+	udph->source = htons(np->local_port);
+	udph->dest = htons(np->remote_port);
+	udph->len = htons(udp_len);
+
+	netpoll_udp_checksum(np, skb, len);
+}
+
 static void push_eth(struct netpoll *np, struct sk_buff *skb)
 {
 	struct ethhdr *eth;
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index 11eb95b3248e2..03a49953a3d8a 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h
@@ -75,7 +75,6 @@ void do_netpoll_cleanup(struct netpoll *np);
 netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb);
 struct sk_buff *find_skb(struct netpoll *np, int len, int reserve);
 void netpoll_udp_checksum(struct netpoll *np, struct sk_buff *skb, int len);
-void push_udp(struct netpoll *np, struct sk_buff *skb, int len);
 
 #ifdef CONFIG_NETPOLL
 static inline void *netpoll_poll_lock(struct napi_struct *napi)
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 12165667705f3..4ec9e309dfe6c 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -29,8 +29,8 @@
 #include <linux/slab.h>
 #include <linux/export.h>
 #include <linux/if_vlan.h>
+#include <linux/udp.h>
 #include <net/tcp.h>
-#include <net/udp.h>
 #include <net/addrconf.h>
 #include <net/ndisc.h>
 #include <net/ip6_checksum.h>
@@ -412,25 +412,6 @@ netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
 }
 EXPORT_SYMBOL(netpoll_send_skb);
 
-void push_udp(struct netpoll *np, struct sk_buff *skb, int len)
-{
-	struct udphdr *udph;
-	int udp_len;
-
-	udp_len = len + sizeof(struct udphdr);
-
-	skb_push(skb, sizeof(struct udphdr));
-	skb_reset_transport_header(skb);
-
-	udph = udp_hdr(skb);
-	udph->source = htons(np->local_port);
-	udph->dest = htons(np->remote_port);
-	udph->len = htons(udp_len);
-
-	netpoll_udp_checksum(np, skb, len);
-}
-EXPORT_SYMBOL_GPL(push_udp);
-
 static void skb_pool_flush(struct netpoll *np)
 {
 	struct sk_buff_head *skb_pool;

-- 
2.53.0-Meta