--- zzzz-none-000/linux-3.10.107/arch/sparc/include/asm/ftrace.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/sparc/include/asm/ftrace.h	2021-02-04 17:41:59.000000000 +0000
@@ -2,11 +2,11 @@
 #define _ASM_SPARC64_FTRACE
 
 #ifdef CONFIG_MCOUNT
-#define MCOUNT_ADDR		((long)(_mcount))
+#define MCOUNT_ADDR		((unsigned long)(_mcount))
 #define MCOUNT_INSN_SIZE	4 /* sizeof mcount call */
 
 #ifndef __ASSEMBLY__
-extern void _mcount(void);
+void _mcount(void);
 #endif
 
 #endif
@@ -22,4 +22,8 @@
 };
 #endif /*  CONFIG_DYNAMIC_FTRACE */
 
+unsigned long prepare_ftrace_return(unsigned long parent,
+				    unsigned long self_addr,
+				    unsigned long frame_pointer);
+
 #endif /* _ASM_SPARC64_FTRACE */