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Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_functions.c33
1 files changed, 16 insertions, 17 deletions
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index e467c0c..38cfb29 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -214,38 +214,37 @@ static struct tracer function_trace __read_mostly =
};
#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