linux-kernel - [PATCH 5/8] kernel/ring_buffer: rb_per_cpu

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Date:	Tue, 29 Sep 2015 22:43:33 +0800
From:	Yaowei Bai <bywxiaobai@....com>
To:	rostedt@...dmis.org, mingo@...hat.com
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 5/8] kernel/ring_buffer: rb_per_cpu_empty can be boolean

This patch makes rb_per_cpu_empty return bool to improve readability.

No functional change.

Signed-off-by: Yaowei Bai <bywxiaobai@....com>
---
 kernel/trace/ring_buffer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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 @@ int ring_buffer_write(struct ring_buffer *buffer,
 }
 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 @@ static int rb_per_cpu_empty(struct ring_buffer_per_cpu *cpu_buffer)
 
 	/* In case of error, head will be NULL */
 	if (unlikely(!head))
-		return 1;
+		return true;
 
 	return reader->read == rb_page_commit(reader) &&
 		(commit == reader ||
-- 
1.9.1


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