-/*
- * wrapper/poll.h
+/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
*
- * Copyright (C) 2010-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * wrapper/poll.h
*
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
-#ifndef CONFIG_LIB_RING_BUFFER
-#include <linux/poll.h>
+#ifndef _LTTNG_WRAPPER_POLL_H
+#define _LTTNG_WRAPPER_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."
+#include <linux/poll.h>
/*
- * Will cause higher overhead when signalling all possible reader threads when a
- * buffer is ready to be consumed.
+ * Note: 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 */