X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;ds=sidebyside;f=lib%2Fringbuffer%2Fring_buffer_frontend.c;h=8257dcc63867410291d2dd7bf07ab176449edc3b;hb=c11ab967decd550b28111b2767eda20e7e6be3fd;hp=a477832ef45a9d30914d1dff1473d1e119e4e1d4;hpb=4dce5a4879ae1989d091f6969b143a41ba76ba1f;p=lttng-modules.git

diff --git a/lib/ringbuffer/ring_buffer_frontend.c b/lib/ringbuffer/ring_buffer_frontend.c
index a477832e..8257dcc6 100644
--- a/lib/ringbuffer/ring_buffer_frontend.c
+++ b/lib/ringbuffer/ring_buffer_frontend.c
@@ -1495,8 +1495,7 @@ void lib_ring_buffer_print_errors(struct channel *chan,
 /*
  * lib_ring_buffer_switch_old_start: Populate old subbuffer header.
  *
- * Only executed by SWITCH_FLUSH, which can be issued while tracing is active
- * or at buffer finalization (destroy).
+ * Only executed when the buffer is finalized, in SWITCH_FLUSH.
  */
 static
 void lib_ring_buffer_switch_old_start(struct lib_ring_buffer *buf,
@@ -1692,14 +1691,12 @@ int lib_ring_buffer_try_switch_slow(enum switch_mode mode,
 		unsigned long sb_index, commit_count;
 
 		/*
-		 * We are performing a SWITCH_FLUSH. There may be concurrent
-		 * writes into the buffer if e.g. invoked while performing a
-		 * snapshot on an active trace.
+		 * We are performing a SWITCH_FLUSH. At this stage, there are no
+		 * concurrent writes into the buffer.
 		 *
-		 * If the client does not save any header information (sub-buffer
-		 * header size == 0), don't switch empty subbuffer on finalize,
-		 * because it is invalid to deliver a completely empty
-		 * subbuffer.
+		 * The client does not save any header information.  Don't
+		 * switch empty subbuffer on finalize, because it is invalid to
+		 * deliver a completely empty subbuffer.
 		 */
 		if (!config->cb.subbuffer_header_size())
 			return -1;
@@ -1870,13 +1867,6 @@ void lib_ring_buffer_switch_remote(struct lib_ring_buffer *buf)
 }
 EXPORT_SYMBOL_GPL(lib_ring_buffer_switch_remote);
 
-/* Switch sub-buffer even if current sub-buffer is empty. */
-void lib_ring_buffer_switch_remote_empty(struct lib_ring_buffer *buf)
-{
-	_lib_ring_buffer_switch_remote(buf, SWITCH_FLUSH);
-}
-EXPORT_SYMBOL_GPL(lib_ring_buffer_switch_remote_empty);
-
 /*
  * Returns :
  * 0 if ok