Update ftrace wrapper

[lttng-modules.git] / wrapper / poll.h

diff --git a/wrapper/poll.h b/wrapper/poll.h
index 71ebce94bb50218a729aaa8d4391bd1f48789d3c..080717bde9d0da3757fd304c76f82360e963cdc1 100644 (file)
--- a/wrapper/poll.h
+++ b/wrapper/poll.h
@@ -1,12 +1,16 @@
-#ifndef CONFIG_LIB_RING_BUFFER
-#include <linux/poll.h>
-
-#warning "poll_wait_set_exclusive() is defined as no-op. Will increase LTTng overhead. Please consider using the LTTng kernel tree for better results."
+#ifndef _LTTNG_WRAPPER_POLL_H
+#define _LTTNG_WRAPPER_POLL_H
 
 /*
- * Will cause higher overhead when signalling all possible reader threads when a
- * buffer is ready to be consumed.
+ * Copyright (C) 2011 Mathieu Desnoyers (mathieu.desnoyers@efficios.com)
+ *
+ * Dual LGPL v2.1/GPL v2 license.
  */
+
+#include <linux/poll.h>
+
+#warning "poll_wait_set_exclusive() is defined as no-op. Thundering herd effect can be noticed with large number of consumer threads."
+
 #define poll_wait_set_exclusive(poll_table)
 
-#endif
+#endif /* _LTTNG_WRAPPER_POLL_H */