Update ftrace wrapper

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

diff --git a/wrapper/poll.h b/wrapper/poll.h
index 416ce5740da7a6e15b88401e209c49dc54860310..080717bde9d0da3757fd304c76f82360e963cdc1 100644 (file)
--- a/wrapper/poll.h
+++ b/wrapper/poll.h
@@ -1,20 +1,16 @@
+#ifndef _LTTNG_WRAPPER_POLL_H
+#define _LTTNG_WRAPPER_POLL_H
+
 /*
- * wrapper/poll.h
- *
- * Copyright (C) 2010-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011 Mathieu Desnoyers (mathieu.desnoyers@efficios.com)
  *
  * Dual LGPL v2.1/GPL v2 license.
  */
 
-#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."
+#warning "poll_wait_set_exclusive() is defined as no-op. Thundering herd effect can be noticed with large number of consumer threads."
 
-/*
- * Will cause higher overhead when signalling all possible reader threads when a
- * buffer is ready to be consumed.
- */
 #define poll_wait_set_exclusive(poll_table)
 
-#endif
+#endif /* _LTTNG_WRAPPER_POLL_H */