--- a/backport-include/net/genetlink.h	2023-10-19 17:24:48.721119999 +0200
+++ b/backport-include/net/genetlink.h	2023-10-19 17:35:11.810569190 +0200
@@ -3,6 +3,7 @@
 #include_next <net/genetlink.h>
 #include <linux/version.h>
 
+#if LINUX_VERSION_IS_LESS(6,5,0)
 static inline void __bp_genl_info_userhdr_set(struct genl_info *info,
 					      void *userhdr)
 {
@@ -13,6 +14,7 @@
 {
 	return info->userhdr;
 }
+#endif /* < 6.5.0 */
 
 #if LINUX_VERSION_IS_LESS(4,12,0)
 #define GENL_SET_ERR_MSG(info, msg) NL_SET_ERR_MSG(genl_info_extack(info), msg)
@@ -47,10 +47,12 @@
 }
 
 /* this gets put in place of info->userhdr, since we use that above */
+#if LINUX_VERSION_IS_LESS(6,5,0)
 static inline void *genl_info_userhdr(struct genl_info *info)
 {
 	return (u8 *)info->genlhdr + GENL_HDRLEN;
 }
+#endif
 
 #if LINUX_VERSION_IS_LESS(4,10,0)
 #define __genl_ro_after_init