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Date: Wed, 11 May 2016 17:22:03 +0800 From: zengzhaoxiu@....com To: linux-kernel@...r.kernel.org, computersforpeace@...il.com Cc: Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>, David Woodhouse <dwmw2@...radead.org>, linux-mtd@...ts.infradead.org Subject: [patch V4 22/31] 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]; -- 2.7.4
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