1 files changed, 20 insertions, 15 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 94ed45e93a80..b3f9ad1b4d84 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -335,6 +335,25 @@ struct tracer_flags {
 #define TRACER_OPT(s, b)        .name = #s, .bit = b
 
 /*
+ * If you want to provide a stat file (one-shot statistics), fill
+ * an iterator with stat_start/stat_next and a stat_show callbacks.
+ * The others callbacks are optional.
+ */
+struct tracer_stat {
+        /* The name of your stat file */
+        const char              *name;
+        /* Iteration over statistic entries */
+        void                    *(*stat_start)(void);
+        void                    *(*stat_next)(void *prev, int idx);
+        /* Compare two entries for sorting (optional) for stats */
+        int                     (*stat_cmp)(void *p1, void *p2);
+        /* Print a stat entry */
+        int                     (*stat_show)(struct seq_file *s, void *p);
+        /* Print the headers of your stat entries */
+        int                     (*stat_headers)(struct seq_file *s);
+};
+
+/*
  * A specific tracer, represented by methods that operate on a trace array:
  */
 struct tracer {
@@ -361,21 +380,7 @@ struct tracer {
         struct tracer           *next;
         int                     print_max;
         struct tracer_flags     *flags;
-
-        /*
-         * If you change one of the following on tracing runtime, recall
-         * init_tracer_stat()
-         */
-
-        /* Iteration over statistic entries */
-        void                    *(*stat_start)(void);
-        void                    *(*stat_next)(void *prev, int idx);
-        /* Compare two entries for sorting (optional) for stats */
-        int                     (*stat_cmp)(void *p1, void *p2);
-        /* Print a stat entry */
-        int                     (*stat_show)(struct seq_file *s, void *p);
-        /* Print the headers of your stat entries */
-        int                     (*stat_headers)(struct seq_file *s);
+        struct tracer_stat      *stats;
 };
 
 struct trace_seq {