tracing: Use temp buffer when filtering events

[android-x86/kernel.git] / kernel / trace / trace_events.c

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index da1eeb6..4d00670 100644 (file)
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -363,6 +363,7 @@ static int __ftrace_event_enable_disable(struct trace_event_file *file,
 {
        struct trace_event_call *call = file->event_call;
        struct trace_array *tr = file->tr;
+       unsigned long file_flags = file->flags;
        int ret = 0;
        int disable;
 
@@ -445,6 +446,15 @@ static int __ftrace_event_enable_disable(struct trace_event_file *file,
                break;
        }
 
+       /* Enable or disable use of trace_buffered_event */
+       if ((file_flags & EVENT_FILE_FL_SOFT_DISABLED) !=
+           (file->flags & EVENT_FILE_FL_SOFT_DISABLED)) {
+               if (file->flags & EVENT_FILE_FL_SOFT_DISABLED)
+                       trace_buffered_event_enable();
+               else
+                       trace_buffered_event_disable();
+       }
+
        return ret;
 }