[RFC 2/9] prd: add support for rw_page()

[Boaz Harrosh <boaz@plexistor.com>]

From: Ross Zwisler <ross.zwisler@linux.intel.com>

Based on commit a72132c31d58 brd: add support for rw_page()

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
---
 drivers/block/prd.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/block/prd.c b/drivers/block/prd.c
index 7684197..4cfc4f8 100644
--- a/drivers/block/prd.c
+++ b/drivers/block/prd.c
@@ -185,6 +185,16 @@ out:
 	bio_endio(bio, err);
 }
 
+static int prd_rw_page(struct block_device *bdev, sector_t sector,
+		       struct page *page, int rw)
+{
+	struct prd_device *prd = bdev->bd_disk->private_data;
+
+	prd_do_bvec(prd, page, PAGE_CACHE_SIZE, 0, rw, sector);
+	page_endio(page, rw & WRITE, 0);
+	return 0;
+}
+
 static long prd_direct_access(struct block_device *bdev, sector_t sector,
 			      void **kaddr, unsigned long *pfn, long size)
 {
@@ -201,6 +211,7 @@ static long prd_direct_access(struct block_device *bdev, sector_t sector,
 
 static const struct block_device_operations prd_fops = {
 	.owner =		THIS_MODULE,
+	.rw_page =		prd_rw_page,
 	.direct_access =	prd_direct_access,
 };
 
-- 
1.9.3


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