Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/oprofile/event_buffer.h b/drivers/oprofile/event_buffer.h
new file mode 100644
index 000000000..a8d5bb3cb
--- /dev/null
+++ b/drivers/oprofile/event_buffer.h
@@ -0,0 +1,40 @@
+/**
+ * @file event_buffer.h
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon <levon@movementarian.org>
+ */
+
+#ifndef EVENT_BUFFER_H
+#define EVENT_BUFFER_H
+
+#include <linux/types.h>
+#include <linux/mutex.h>
+
+int alloc_event_buffer(void);
+
+void free_event_buffer(void);
+
+/**
+ * Add data to the event buffer.
+ * The data passed is free-form, but typically consists of
+ * file offsets, dcookies, context information, and ESCAPE codes.
+ */
+void add_event_entry(unsigned long data);
+
+/* wake up the process sleeping on the event file */
+void wake_up_buffer_waiter(void);
+
+#define INVALID_COOKIE ~0UL
+#define NO_COOKIE 0UL
+
+extern const struct file_operations event_buffer_fops;
+
+/* mutex between sync_cpu_buffers() and the
+ * file reading code.
+ */
+extern struct mutex buffer_mutex;
+
+#endif /* EVENT_BUFFER_H */