ring_buffer: ring_buffer_empty{cpu}() can return boolean
Make ring_buffer_empty() and ring_buffer_empty_cpu() return bool.
No functional change.
Link: http://lkml.kernel.org/r/1443537816-5788-5-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/include/linux/ring_buffer.h b/include/linux/ring_buffer.h
index e2c13cd..4acc552 100644
--- a/include/linux/ring_buffer.h
+++ b/include/linux/ring_buffer.h
@@ -154,8 +154,8 @@
}
#endif
-int ring_buffer_empty(struct ring_buffer *buffer);
-int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu);
+bool ring_buffer_empty(struct ring_buffer *buffer);
+bool ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu);
void ring_buffer_record_disable(struct ring_buffer *buffer);
void ring_buffer_record_enable(struct ring_buffer *buffer);
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 26a948f..fc9ce12 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -4267,7 +4267,7 @@
* rind_buffer_empty - is the ring buffer empty?
* @buffer: The ring buffer to test
*/
-int ring_buffer_empty(struct ring_buffer *buffer)
+bool ring_buffer_empty(struct ring_buffer *buffer)
{
struct ring_buffer_per_cpu *cpu_buffer;
unsigned long flags;
@@ -4285,10 +4285,10 @@
local_irq_restore(flags);
if (!ret)
- return 0;
+ return false;
}
- return 1;
+ return true;
}
EXPORT_SYMBOL_GPL(ring_buffer_empty);
@@ -4297,7 +4297,7 @@
* @buffer: The ring buffer
* @cpu: The CPU buffer to test
*/
-int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
+bool ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
{
struct ring_buffer_per_cpu *cpu_buffer;
unsigned long flags;
@@ -4305,7 +4305,7 @@
int ret;
if (!cpumask_test_cpu(cpu, buffer->cpumask))
- return 1;
+ return true;
cpu_buffer = buffer->buffers[cpu];
local_irq_save(flags);