Fix: wrapper random documentation

[lttng-modules.git] / lib / ringbuffer / frontend_types.h

diff --git a/lib/ringbuffer/frontend_types.h b/lib/ringbuffer/frontend_types.h
index 2b0c93291429d6139dffdeda7490bf1b62715e8d..3fd634524f8ab9b59e59eed14f4adb6e169a4d5a 100644 (file)
--- a/lib/ringbuffer/frontend_types.h
+++ b/lib/ringbuffer/frontend_types.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
  *
  * lib/ringbuffer/frontend_types.h
  *
@@ -15,7 +15,6 @@
 #include <linux/kref.h>
 #include <wrapper/ringbuffer/config.h>
 #include <wrapper/ringbuffer/backend_types.h>
-#include <wrapper/spinlock.h>
 #include <lib/prio_heap/lttng_prio_heap.h>     /* For per-CPU read-side iterator */
 #include <lttng-cpuhotplug.h>
 
@@ -121,6 +120,20 @@ struct lib_ring_buffer {
 
        struct commit_counters_cold *commit_cold;
                                        /* Commit count per sub-buffer */
+       u64 *ts_end;                    /*
+                                        * timestamp_end per sub-buffer.
+                                        * Time is sampled by the
+                                        * switch_*_end() callbacks which
+                                        * are the last space reservation
+                                        * performed in the sub-buffer
+                                        * before it can be fully
+                                        * committed and delivered. This
+                                        * time value is then read by
+                                        * the deliver callback,
+                                        * performed by the last commit
+                                        * before the buffer becomes
+                                        * readable.
+                                        */
        atomic_long_t active_readers;   /*
                                         * Active readers count
                                         * standard atomic access (shared)