[PATCH v2] raid5-ppl: use swap() to make code cleaner

[cgel . zte]

From: Yang Guang <yang.guang5@xxxxxxxxxx>

Use the macro `swap()` defined in `include/linux/minmax.h` to avoid
opencoding it.

Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
Signed-off-by: Yang Guang <yang.guang5@xxxxxxxxxx>
---
 drivers/md/raid5-ppl.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c
index 3ddc2aa0b530..4ab417915d7f 100644
--- a/drivers/md/raid5-ppl.c
+++ b/drivers/md/raid5-ppl.c
@@ -1081,7 +1081,7 @@ static int ppl_load_distributed(struct ppl_log *log)
 	struct ppl_conf *ppl_conf = log->ppl_conf;
 	struct md_rdev *rdev = log->rdev;
 	struct mddev *mddev = rdev->mddev;
-	struct page *page, *page2, *tmp;
+	struct page *page, *page2;
 	struct ppl_header *pplhdr = NULL, *prev_pplhdr = NULL;
 	u32 crc, crc_stored;
 	u32 signature;
@@ -1156,9 +1156,7 @@ static int ppl_load_distributed(struct ppl_log *log)
 		prev_pplhdr_offset = pplhdr_offset;
 		prev_pplhdr = pplhdr;
 
-		tmp = page;
-		page = page2;
-		page2 = tmp;
+		swap(page, page2);
 
 		/* calculate next potential ppl offset */
 		for (i = 0; i < le32_to_cpu(pplhdr->entries_count); i++)
-- 
2.30.2