--- zzzz-none-000/linux-4.4.60/arch/arm64/include/asm/cpufeature.h	2017-04-08 07:53:53.000000000 +0000
+++ hawkeye-5590-729/linux-4.4.60/arch/arm64/include/asm/cpufeature.h	2022-03-30 14:21:51.000000000 +0000
@@ -38,6 +38,8 @@
 
 #include <linux/kernel.h>
 
+extern const char* machine_name;
+
 /* CPU feature register tracking */
 enum ftr_type {
 	FTR_EXACT,	/* Use a predefined safe value */