[PATCH v2] dm vdo indexer: Use swap() in swap_open_chapter()

[Jiapeng Chong]

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@xxxxxxxxxxxxxxxxx>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9173
Signed-off-by: Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>
---
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