--- zzzz-none-000/linux-3.10.107/arch/x86/mm/mm_internal.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/x86/mm/mm_internal.h	2021-02-04 17:41:59.000000000 +0000
@@ -16,4 +16,6 @@
 
 extern int after_bootmem;
 
+void update_cache_mode_entry(unsigned entry, enum page_cache_mode cache);
+
 #endif	/* __X86_MM_INTERNAL_H */