};
#ifdef CONFIG_DYNAMIC_FTRACE
-static void
-ftrace_traceon(unsigned long ip, unsigned long parent_ip, void **data)
+static int update_count(void **data)
{
- long *count = (long *)data;
-
- if (tracing_is_on())
- return;
+ unsigned long *count = (long *)data;
if (!*count)
- return;
+ return 0;
if (*count != -1)
(*count)--;
- tracing_on();
+ return 1;
}
static void
-ftrace_traceoff(unsigned long ip, unsigned long parent_ip, void **data)
+ftrace_traceon(unsigned long ip, unsigned long parent_ip, void **data)
{
- long *count = (long *)data;
-
- if (!tracing_is_on())
+ if (tracing_is_on())
return;
- if (!*count)
- return;
+ if (update_count(data))
+ tracing_on();
+}
- if (*count != -1)
- (*count)--;
+static void
+ftrace_traceoff(unsigned long ip, unsigned long parent_ip, void **data)
+{
+ if (!tracing_is_on())
+ return;
- tracing_off();
+ if (update_count(data))
+ tracing_off();
}
static int
return 0;
}
-static int
-ftrace_trace_onoff_unreg(char *glob, char *cmd, char *param)
-{
- struct ftrace_probe_ops *ops;
-
- /* we register both traceon and traceoff to this callback */
- if (strcmp(cmd, "traceon") == 0)
- ops = &traceon_probe_ops;
- else
- ops = &traceoff_probe_ops;
-
- unregister_ftrace_function_probe_func(glob, ops);
-
- return 0;
-}
-
static int
ftrace_trace_onoff_callback(struct ftrace_hash *hash,
char *glob, char *cmd, char *param, int enable)
if (!enable)
return -EINVAL;
- if (glob[0] == '!')
- return ftrace_trace_onoff_unreg(glob+1, cmd, param);
-
/* we register both traceon and traceoff to this callback */
if (strcmp(cmd, "traceon") == 0)
ops = &traceon_probe_ops;
else
ops = &traceoff_probe_ops;
+ if (glob[0] == '!') {
+ unregister_ftrace_function_probe_func(glob+1, ops);
+ return 0;
+ }
+
if (!param)
goto out_reg;