Kernel module basic ipv4 with debug settings

logging.h

@@ -9,7 +9,7 @@
 #define printf pr_info
 #define perror pr_err
 #define lgerror(msg, ret, ...) __extension__ ({		\
-	printf(msg ": %d\n", ##__VA_ARGS__, ret);	\
+	pr_err(msg ": %d\n", ##__VA_ARGS__, ret);	\
 })
 #else
 #include <stdio.h> // IWYU pragma: export