Index: wireguard-linux-compat-1.0.20211208/src/compat/compat.h
===================================================================
--- wireguard-linux-compat-1.0.20211208.orig/src/compat/compat.h
+++ wireguard-linux-compat-1.0.20211208/src/compat/compat.h
@@ -11,6 +11,8 @@
 #include <linux/types.h>
 #include <generated/utsrelease.h>
 
+#define fallthrough
+
 #ifdef RHEL_MAJOR
 #if RHEL_MAJOR == 7
 #define ISRHEL7
@@ -686,15 +688,6 @@ struct __compat_dummy_container { char d
 #define genl_dump_check_consistent(a, b) genl_dump_check_consistent(a, b, &genl_family)
 #endif
 
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0) && !defined(ISRHEL7)
-static inline void *skb_put_data(struct sk_buff *skb, const void *data, unsigned int len)
-{
-	void *tmp = skb_put(skb, len);
-	memcpy(tmp, data, len);
-	return tmp;
-}
-#endif
-
 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 19, 0) && !defined(ISRHEL7)
 #define napi_complete_done(n, work_done) napi_complete(n)
 #endif
