parisc: ftrace: Add declaration for ftrace_function_trampoline()

Make sparse happy by adding declaration for
ftrace_function_trampoline().
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/include/asm/ftrace.h

@@ -12,6 +12,10 @@ extern void mcount(void);
 extern unsigned long sys_call_table[];
 
 extern unsigned long return_address(unsigned int);
+struct ftrace_regs;
+extern void ftrace_function_trampoline(unsigned long parent,
+		unsigned long self_addr, unsigned long org_sp_gr3,
+		struct ftrace_regs *fregs);
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 extern void ftrace_caller(void);

arch/parisc/kernel/ftrace.c

@@ -53,7 +53,7 @@ static void __hot prepare_ftrace_return(unsigned long *parent,
 
 static ftrace_func_t ftrace_func;
 
-void notrace __hot ftrace_function_trampoline(unsigned long parent,
+asmlinkage void notrace __hot ftrace_function_trampoline(unsigned long parent,
 				unsigned long self_addr,
 				unsigned long org_sp_gr3,
 				struct ftrace_regs *fregs)