Merge tag 'trace-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux...

[sfrench/cifs-2.6.git] / kernel / trace / trace_events.c

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 4d006707b9475b056d2e55147b78856374192595..3d4155892a1e78cf6b8b7850e9a64c460fe825b5 100644 (file)
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -204,6 +204,24 @@ static void trace_destroy_fields(struct trace_event_call *call)
        }
 }
 
+/*
+ * run-time version of trace_event_get_offsets_<call>() that returns the last
+ * accessible offset of trace fields excluding __dynamic_array bytes
+ */
+int trace_event_get_offsets(struct trace_event_call *call)
+{
+       struct ftrace_event_field *tail;
+       struct list_head *head;
+
+       head = trace_get_fields(call);
+       /*
+        * head->next points to the last field with the largest offset,
+        * since it was added last by trace_define_field()
+        */
+       tail = list_first_entry(head, struct ftrace_event_field, link);
+       return tail->offset + tail->size;
+}
+
 int trace_event_raw_init(struct trace_event_call *call)
 {
        int id;
@@ -2148,8 +2166,13 @@ event_create_dir(struct dentry *parent, struct trace_event_file *file)
        trace_create_file("filter", 0644, file->dir, file,
                          &ftrace_event_filter_fops);
 
-       trace_create_file("trigger", 0644, file->dir, file,
-                         &event_trigger_fops);
+       /*
+        * Only event directories that can be enabled should have
+        * triggers.
+        */
+       if (!(call->flags & TRACE_EVENT_FL_IGNORE_ENABLE))
+               trace_create_file("trigger", 0644, file->dir, file,
+                                 &event_trigger_fops);
 
 #ifdef CONFIG_HIST_TRIGGERS
        trace_create_file("hist", 0444, file->dir, file,