[PATCH] drbd: use copy_highpage

[PATCH] drbd: use copy_highpage

[Akinobu Mita]

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

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: drbd-dev@lists.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

[PATCH] gpu/drm/ttm: use copy_highpage

[Akinobu Mita]

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

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
---
 drivers/gpu/drm/ttm/ttm_tt.c | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index fa09daf..11c9369 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -290,8 +290,6 @@ int ttm_tt_swapin(struct ttm_tt *ttm)
 	struct file *swap_storage;
 	struct page *from_page;
 	struct page *to_page;
-	void *from_virtual;
-	void *to_virtual;
 	int i;
 	int ret = -ENOMEM;
 
@@ -311,11 +309,7 @@ int ttm_tt_swapin(struct ttm_tt *ttm)
 			goto out_err;
 
 		preempt_disable();
-		from_virtual = kmap_atomic(from_page);
-		to_virtual = kmap_atomic(to_page);
-		memcpy(to_virtual, from_virtual, PAGE_SIZE);
-		kunmap_atomic(to_virtual);
-		kunmap_atomic(from_virtual);
+		copy_highpage(to_page, from_page);
 		preempt_enable();
 		page_cache_release(from_page);
 	}
@@ -336,8 +330,6 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
 	struct file *swap_storage;
 	struct page *from_page;
 	struct page *to_page;
-	void *from_virtual;
-	void *to_virtual;
 	int i;
 	int ret = -ENOMEM;
 
@@ -367,11 +359,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage)
 			goto out_err;
 		}
 		preempt_disable();
-		from_virtual = kmap_atomic(from_page);
-		to_virtual = kmap_atomic(to_page);
-		memcpy(to_virtual, from_virtual, PAGE_SIZE);
-		kunmap_atomic(to_virtual);
-		kunmap_atomic(from_virtual);
+		copy_highpage(to_page, from_page);
 		preempt_enable();
 		set_page_dirty(to_page);
 		mark_page_accessed(to_page);
-- 
1.7.11.4