linux-kernel - Re: [PATCH] mtd: nand: gpmi: replace _manual

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Date:   Fri, 3 Nov 2017 20:38:13 +0000
From:   Han Xu <han.xu@....com>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        "Cyrille Pitchen" <cyrille.pitchen@...ev4u.fr>
CC:     "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mtd: nand: gpmi: replace _manual_ swap with swap macro


________________________________________
From: Gustavo A. R. Silva <garsilva@...eddedor.com>
Sent: Friday, November 3, 2017 3:31 PM
To: Han Xu; Boris Brezillon; Richard Weinberger; David Woodhouse; Brian Norris; Marek Vasut; Cyrille Pitchen
Cc: linux-mtd@...ts.infradead.org; linux-kernel@...r.kernel.org; Gustavo A. R. Silva
Subject: [PATCH] mtd: nand: gpmi: replace _manual_ swap with swap macro

Make use of the swap macro and remove unnecessary variables swap.
This makes the code easier to read and maintain.

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
---
 drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
index 50f8d4a..9e365d4 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
@@ -1487,12 +1487,8 @@ static int gpmi_ecc_read_page_raw(struct mtd_info *mtd,
         * See the layout description for a detailed explanation on why this
         * is needed.
         */
-       if (this->swap_block_mark) {
-               u8 swap = tmp_buf[0];
-
-               tmp_buf[0] = tmp_buf[mtd->writesize];
-               tmp_buf[mtd->writesize] = swap;
-       }
+       if (this->swap_block_mark)
+               swap(tmp_buf[0], tmp_buf[mtd->writesize]);

        /*
         * Copy the metadata section into the oob buffer (this section is
@@ -1615,12 +1611,8 @@ static int gpmi_ecc_write_page_raw(struct mtd_info *mtd,
         * See the layout description for a detailed explanation on why this
         * is needed.
         */
-       if (this->swap_block_mark) {
-               u8 swap = tmp_buf[0];
-
-               tmp_buf[0] = tmp_buf[mtd->writesize];
-               tmp_buf[mtd->writesize] = swap;
-       }
+       if (this->swap_block_mark)
+               swap(tmp_buf[0], tmp_buf[mtd->writesize]);

        chip->write_buf(mtd, tmp_buf, mtd->writesize + mtd->oobsize);

Acked-by: Han Xu <han.xu@....com>

--
2.7.4