Fix: wrapper random documentation

[lttng-modules.git] / lib / ringbuffer / vfs.h

diff --git a/lib/ringbuffer/vfs.h b/lib/ringbuffer/vfs.h
index e2bc401002fd0b70d5cc5c6409f7c825d7e8b7d8..ee23a6240a83b0c4da418be866bed9bdd290c2e2 100644 (file)
--- a/lib/ringbuffer/vfs.h
+++ b/lib/ringbuffer/vfs.h
@@ -1,31 +1,15 @@
-#ifndef _LIB_RING_BUFFER_VFS_H
-#define _LIB_RING_BUFFER_VFS_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only)
+ *
  * lib/ringbuffer/vfs.h
  *
  * Wait-free ring buffer VFS file operations.
  *
  * Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * 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
- *
- * Author:
- *     Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  */
 
+#ifndef _LIB_RING_BUFFER_VFS_H
+#define _LIB_RING_BUFFER_VFS_H
+
 #include <linux/fs.h>
 #include <linux/poll.h>
 
@@ -128,6 +112,8 @@ ssize_t vfs_lib_ring_buffer_splice_read(struct file *in, loff_t *ppos,
  * so it can be read again.
  */
 #define RING_BUFFER_METADATA_CACHE_DUMP                _IO(0xF6, 0x10)
+/* Clear ring buffer content. */
+#define RING_BUFFER_CLEAR                      _IO(0xF6, 0x11)
 
 #ifdef CONFIG_COMPAT
 /* Get a snapshot of the current ring buffer producer and consumer positions */
@@ -172,6 +158,9 @@ ssize_t vfs_lib_ring_buffer_splice_read(struct file *in, loff_t *ppos,
 /* Flush the current sub-buffer, even if empty. */
 #define RING_BUFFER_COMPAT_FLUSH_EMPTY                 \
        RING_BUFFER_FLUSH_EMPTY
+/* Clear ring buffer content. */
+#define RING_BUFFER_COMPAT_CLEAR                       \
+       RING_BUFFER_CLEAR
 #endif /* CONFIG_COMPAT */
 
 #endif /* _LIB_RING_BUFFER_VFS_H */