--- zzzz-none-000/linux-4.9.218/arch/mips/include/asm/smp.h	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ax-750/linux-4.9.218/arch/mips/include/asm/smp.h	2023-03-29 10:59:06.000000000 +0000
@@ -62,6 +62,7 @@
 extern cpumask_t cpu_coherent_mask;
 
 extern void asmlinkage smp_bootstrap(void);
+extern char smp_bootstrap_end[];
 
 extern void calculate_cpu_foreign_map(void);