Re: [PATCH] [v3] kallsyms: rework symbol lookup return codes

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 05c0024815bf9..a949f903c9e66 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c

@@ -6965,7 +6965,7 @@ allocate_ftrace_mod_map(struct module *mod,
 	return mod_map;
 }
 
-static const char *
+static int
 ftrace_func_address_lookup(struct ftrace_mod_map *mod_map,
 			   unsigned long addr, unsigned long *size,
 			   unsigned long *off, char *sym)

@@ -6986,21 +6986,18 @@ ftrace_func_address_lookup(struct ftrace_mod_map *mod_map,
 			*size = found_func->size;
 		if (off)
 			*off = addr - found_func->ip;
-		if (sym)
-			strscpy(sym, found_func->name, KSYM_NAME_LEN);
-
-		return found_func->name;
+		return strscpy(sym, found_func->name, KSYM_NAME_LEN);
 	}
 
-	return NULL;
+	return 0;
 }
 
-const char *
+int
 ftrace_mod_address_lookup(unsigned long addr, unsigned long *size,
 		   unsigned long *off, char **modname, char *sym)
 {
 	struct ftrace_mod_map *mod_map;
-	const char *ret = NULL;
+	int ret;
 
 	/* mod_map is freed via call_rcu() */
 	preempt_disable();