[Drbd-dev] [patch 6/6] drbd: use copy_highpage

[akpm at linux-foundation.org]

From: Akinobu Mita <akinobu.mita at gmail.com>
Subject: drbd: use copy_highpage

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

Signed-off-by: Akinobu Mita <akinobu.mita at gmail.com>
Cc: Lars Ellenberg <drbd-dev at lists.linbit.com>
Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
---

 drivers/block/drbd/drbd_bitmap.c |    7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff -puN drivers/block/drbd/drbd_bitmap.c~drbd-use-copy_highpage drivers/block/drbd/drbd_bitmap.c
--- a/drivers/block/drbd/drbd_bitmap.c~drbd-use-copy_highpage
+++ a/drivers/block/drbd/drbd_bitmap.c
@@ -977,13 +977,8 @@ static void bm_page_io_async(struct bm_a
 	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];
_