linux-kernel - [PATCH] drbd: use copy

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Message-Id: <1348574222-3512-1-git-send-email-akinobu.mita@gmail.com>
Date:	Tue, 25 Sep 2012 20:57:01 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Cc:	Akinobu Mita <akinobu.mita@...il.com>, drbd-dev@...ts.linbit.com
Subject: [PATCH] drbd: use copy_highpage

Use copy_highpage() to copy from one page to another.

Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
Cc: drbd-dev@...ts.linbit.com
---
 drivers/block/drbd/drbd_bitmap.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index d4d3c81..ec7f76c 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -975,13 +975,8 @@ static void bm_page_io_async(struct bm_aio_ctx *ctx, int page_nr, int rw) __must
 	bm_set_page_unchanged(b->bm_pages[page_nr]);
 
 	if (ctx->flags & BM_AIO_COPY_PAGES) {
-		void *src, *dest;
 		page = mempool_alloc(drbd_md_io_page_pool, __GFP_HIGHMEM|__GFP_WAIT);
-		dest = kmap_atomic(page);
-		src = kmap_atomic(b->bm_pages[page_nr]);
-		memcpy(dest, src, PAGE_SIZE);
-		kunmap_atomic(src);
-		kunmap_atomic(dest);
+		copy_highpage(page, b->bm_pages[page_nr]);
 		bm_store_page_idx(page, page_nr);
 	} else
 		page = b->bm_pages[page_nr];
-- 
1.7.11.4

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