ring-buffer: rb_per_cpu_empty() can return boolean
Makes rb_per_cpu_empty() return bool to improve readability.
No functional change.
Link: http://lkml.kernel.org/r/1443537816-5788-6-git-send-email-bywxiaobai@163.com
Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index fc9ce12..a228789 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -3039,7 +3039,7 @@
}
EXPORT_SYMBOL_GPL(ring_buffer_write);
-static int rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)
+static bool rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)
{
struct buffer_page *reader = cpu_buffer->reader_page;
struct buffer_page *head = rb_set_head_page(cpu_buffer);
@@ -3047,7 +3047,7 @@
/* In case of error, head will be NULL */
if (unlikely(!head))
- return 1;
+ return true;
return reader->read == rb_page_commit(reader) &&
(commit == reader ||