--- zzzz-none-000/linux-4.4.271/arch/arm64/include/asm/cpufeature.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/arch/arm64/include/asm/cpufeature.h	2023-04-19 10:22:27.000000000 +0000
@@ -39,6 +39,8 @@
 
 #include <linux/kernel.h>
 
+extern const char* machine_name;
+
 /* CPU feature register tracking */
 enum ftr_type {
 	FTR_EXACT,			/* Use a predefined safe value */