linux-kernel - [PATCH v2] dm vdo indexer: Use swap() in swap_open

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Date: Wed, 29 May 2024 10:12:31 +0800
From: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To: msakai@...hat.com
Cc: dm-devel@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
	Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH v2] dm vdo indexer: Use swap() in swap_open_chapter()

Use existing swap() function rather than duplicating its implementation.

/drivers/md/dm-vdo/indexer/index.c:207:43-44: WARNING opportunity for swap().

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9173
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
Changes in v2:
  -Amend commit message to make it more clear.

 drivers/md/dm-vdo/indexer/index.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/md/dm-vdo/indexer/index.c b/drivers/md/dm-vdo/indexer/index.c
index 1ba767144426..df4934846244 100644
--- a/drivers/md/dm-vdo/indexer/index.c
+++ b/drivers/md/dm-vdo/indexer/index.c
@@ -197,15 +197,12 @@ static int finish_previous_chapter(struct uds_index *index, u64 current_chapter_
 static int swap_open_chapter(struct index_zone *zone)
 {
 	int result;
-	struct open_chapter_zone *temporary_chapter;
 
 	result = finish_previous_chapter(zone->index, zone->newest_virtual_chapter);
 	if (result != UDS_SUCCESS)
 		return result;
 
-	temporary_chapter = zone->open_chapter;
-	zone->open_chapter = zone->writing_chapter;
-	zone->writing_chapter = temporary_chapter;
+	swap(zone->open_chapter, zone->writing_chapter);
 	return UDS_SUCCESS;
 }
 
-- 
2.20.1.7.g153144c