--- zzzz-none-000/linux-3.10.107/arch/powerpc/include/asm/btext.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/include/asm/btext.h	2021-02-04 17:41:59.000000000 +0000
@@ -13,6 +13,7 @@
 extern void btext_setup_display(int width, int height, int depth, int pitch,
 				unsigned long address);
 extern void btext_prepare_BAT(void);
+extern void btext_map(void);
 extern void btext_unmap(void);
 
 extern void btext_drawchar(char c);