Import lib ring buffer into LTTng modules

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

diff --git a/wrapper/poll.h b/wrapper/poll.h
new file mode 100644 (file)
index 0000000..71ebce9
--- /dev/null
+++ b/wrapper/poll.h
@@ -0,0 +1,12 @@
+#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."
+
+/*
+ * 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