Add CPU hotplug notifier for ltt debugfs ABI, add pollwait exclusive wrapper

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

diff --git a/wrapper/poll.h b/wrapper/poll.h
index 71ebce94bb50218a729aaa8d4391bd1f48789d3c..ae524730cda3e184c34293e69d8bd7beec4fa5d3 100644 (file)
--- a/wrapper/poll.h
+++ b/wrapper/poll.h
@@ -1,12 +1,20 @@
-#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)
+ *
+ * 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.
+ *
+ * Dual LGPL v2.1/GPL v2 license.
  */
-#define poll_wait_set_exclusive(poll_table)
 
-#endif
+#include <linux/poll.h>
+
+void wrapper_pollwait_exclusive(struct file *filp,
+                        wait_queue_head_t *wait_address,
+                        poll_table *p);
+
+#endif /* _LTTNG_WRAPPER_POLL_H */