Version 2.4.4

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

diff --git a/wrapper/poll.h b/wrapper/poll.h
index ae524730cda3e184c34293e69d8bd7beec4fa5d3..c26610ea990ca57c1dd97cf5f89064aca771b97c 100644 (file)
--- a/wrapper/poll.h
+++ b/wrapper/poll.h
@@ -2,19 +2,32 @@
 #define _LTTNG_WRAPPER_POLL_H
 
 /*
- * Copyright (C) 2011 Mathieu Desnoyers (mathieu.desnoyers@efficios.com)
+ * wrapper/poll.h
  *
- * wrapper around poll __pollwait and poll_get_entry. Using KALLSYMS to get its
- * address when available, else we need to have a kernel that exports this
- * function to GPL modules.
+ * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <linux/poll.h>
 
-void wrapper_pollwait_exclusive(struct file *filp,
-                        wait_queue_head_t *wait_address,
-                        poll_table *p);
+/*
+ * 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 /* _LTTNG_WRAPPER_POLL_H */