License cleanup, ifdef namespace cleanup

[lttng-modules.git] / lib / ringbuffer / ring_buffer_splice.c

diff --git a/lib/ringbuffer/ring_buffer_splice.c b/lib/ringbuffer/ring_buffer_splice.c
index 5fa779f5a63e1038ad477abea8d7807a335fbf2c..59a1589bb1301cc32ad5372bce6a7f26d3b09d17 100644 (file)
--- a/lib/ringbuffer/ring_buffer_splice.c
+++ b/lib/ringbuffer/ring_buffer_splice.c
@@ -3,11 +3,24 @@
  *
  * Copyright (C) 2002-2005 - Tom Zanussi <zanussi@us.ibm.com>, IBM Corp
  * Copyright (C) 1999-2005 - Karim Yaghmour <karim@opersys.com>
- * Copyright (C) 2008-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2008-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * Re-using content from kernel/relay.c.
+ * 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 file is released under the GPL v2.
+ * 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
+ *
+ * Re-using code from kernel/relay.c, which is why it is licensed under
+ * the GPLv2.
  */
 
 #include <linux/module.h>
@@ -69,7 +82,7 @@ static int subbuf_splice_actor(struct file *in,
 {
        struct lib_ring_buffer *buf = in->private_data;
        struct channel *chan = buf->backend.chan;
-       const struct lib_ring_buffer_config *config = chan->backend.config;
+       const struct lib_ring_buffer_config *config = &chan->backend.config;
        unsigned int poff, subbuf_pages, nr_pages;
        struct page *pages[PIPE_DEF_BUFFERS];
        struct partial_page partial[PIPE_DEF_BUFFERS];
@@ -81,7 +94,7 @@ static int subbuf_splice_actor(struct file *in,
                .ops = &ring_buffer_pipe_buf_ops,
                .spd_release = lib_ring_buffer_page_release,
        };
-       unsigned long consumed_old, consumed_idx, roffset;
+       unsigned long consumed_old, roffset;
        unsigned long bytes_avail;
 
        /*
@@ -90,7 +103,6 @@ static int subbuf_splice_actor(struct file *in,
        WARN_ON(atomic_long_read(&buf->active_readers) != 1);
        consumed_old = lib_ring_buffer_get_consumed(config, buf);
        consumed_old += *ppos;
-       consumed_idx = subbuf_index(consumed_old, chan);
 
        /*
         * Adjust read len, if longer than what is available.
@@ -152,7 +164,7 @@ ssize_t lib_ring_buffer_splice_read(struct file *in, loff_t *ppos,
 {
        struct lib_ring_buffer *buf = in->private_data;
        struct channel *chan = buf->backend.chan;
-       const struct lib_ring_buffer_config *config = chan->backend.config;
+       const struct lib_ring_buffer_config *config = &chan->backend.config;
        ssize_t spliced;
        int ret;