linux-kernel - [PATCH V3 22/29] mtd: use parity16 in sm

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Message-Id: <1460603484-5546-1-git-send-email-zengzhaoxiu@163.com>
Date:	Thu, 14 Apr 2016 11:11:24 +0800
From:	zengzhaoxiu@....com
To:	linux-kernel@...r.kernel.org
Cc:	Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	linux-mtd@...ts.infradead.org
Subject: [PATCH V3 22/29] mtd: use parity16 in sm_ftl

From: Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>
---
 drivers/mtd/sm_ftl.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/sm_ftl.c b/drivers/mtd/sm_ftl.c
index b096f8b..345ff1a 100644
--- a/drivers/mtd/sm_ftl.c
+++ b/drivers/mtd/sm_ftl.c
@@ -136,7 +136,7 @@ static int sm_get_lba(uint8_t *lba)
 		return -2;
 
 	/* check parity - endianness doesn't matter */
-	if (hweight16(*(uint16_t *)lba) & 1)
+	if (parity16(*(uint16_t *)lba))
 		return -2;
 
 	return (lba[1] >> 1) | ((lba[0] & 0x07) << 7);
@@ -183,8 +183,7 @@ static void sm_write_lba(struct sm_oob *oob, uint16_t lba)
 	tmp[0] = 0x10 | ((lba >> 7) & 0x07);
 	tmp[1] = (lba << 1) & 0xFF;
 
-	if (hweight16(*(uint16_t *)tmp) & 0x01)
-		tmp[1] |= 1;
+	tmp[1] |= parity16(*(uint16_t *)tmp);
 
 	oob->lba_copy1[0] = oob->lba_copy2[0] = tmp[0];
 	oob->lba_copy1[1] = oob->lba_copy2[1] = tmp[1];
-- 
2.5.0