ftrace: Remove return value of ftrace_arch_modify_*()

All instances of the function ftrace_arch_modify_prepare() and ftrace_arch_modify_post_process() return zero. There's no point in checking their return value. Just have them be void functions. Link: https://lkml.kernel.org/r/20220518023639.4065-1-kunyu@nfschina.com

Li kunyu committed 4 years ago

Commit 3a2bfec1 parent 2decd166 files · +13 −28Browse files

Showing the changes to kernel/trace (1 of 6 files). Show all

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kernel/trace/ftrace.c+4−12

  * archs can override this function if they must do something
  * before the modifying code is performed.
  */
-int __weak ftrace_arch_code_modify_prepare(void)
+void __weak ftrace_arch_code_modify_prepare(void)
 {
-	return 0;
 }
 /*
  * archs can override this function if they must do something
  * after the modifying code is performed.
  */
-int __weak ftrace_arch_code_modify_post_process(void)
+void __weak ftrace_arch_code_modify_post_process(void)
 {
-	return 0;
 }
 void ftrace_modify_all_code(int command)
 static void ftrace_run_update_code(int command)
 {
-	int ret;
+	ftrace_arch_code_modify_prepare();
-	ret = ftrace_arch_code_modify_prepare();
-	FTRACE_WARN_ON(ret);
-	if (ret)
-		return;
 	/*
 	 * By default we use stop_machine() to modify the code.
 	 */
 	arch_ftrace_update_code(command);
-	ret = ftrace_arch_code_modify_post_process();
+	ftrace_arch_code_modify_post_process();
-	FTRACE_WARN_ON(ret);
 }
 static void ftrace_run_modify_code(struct ftrace_ops *ops, int command,