linux-kernel - [PATCH] zram: use copy

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Message-ID: <20231007070554.8657-1-mark-pk.tsai@mediatek.com>
Date:   Sat, 7 Oct 2023 15:05:53 +0800
From:   Mark-PK Tsai <mark-pk.tsai@...iatek.com>
To:     Minchan Kim <minchan@...nel.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Jens Axboe <axboe@...nel.dk>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
CC:     <yj.chiang@...iatek.com>, Mark-PK Tsai <mark-pk.tsai@...iatek.com>,
        <linux-kernel@...r.kernel.org>, <linux-block@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH] zram: use copy_page for full page copy

Some architectures, such as arm, have implemented
optimized copy_page for full page copying.

Replace the full page memcpy with copy_page to
take advantage of the optimization.

Signed-off-by: Mark-PK Tsai <mark-pk.tsai@...iatek.com>
---
 drivers/block/zram/zram_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index d77d3664ca08..58700dd73d1d 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1338,7 +1338,7 @@ static int zram_read_from_zspool(struct zram *zram, struct page *page,
 	src = zs_map_object(zram->mem_pool, handle, ZS_MM_RO);
 	if (size == PAGE_SIZE) {
 		dst = kmap_atomic(page);
-		memcpy(dst, src, PAGE_SIZE);
+		copy_page(dst, src);
 		kunmap_atomic(dst);
 		ret = 0;
 	} else {
-- 
2.18.0