From: Kent Overstreet <kent.overstreet@xxxxxxxxx>
Refactor sync_request_write() of md/raid10 to use bio_copy_data()
instead of open coding bio_vec iterations.
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Neil Brown <neilb@xxxxxxx>
Cc: linux-raid@xxxxxxxxxxxxxxx
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: NeilBrown <neilb@xxxxxxx>
Signed-off-by: Kent Overstreet <kent.overstreet@xxxxxxxxx>
[dpark: add more description in commit message]
Signed-off-by: Dongsu Park <dpark@xxxxxxxxxx>
Signed-off-by: Ming Lin <mlin@xxxxxxxxxx>
---
drivers/md/raid10.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index a46c402..6ea6f5f 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1989,17 +1989,10 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
tbio->bi_rw = WRITE;
tbio->bi_private = r10_bio;
tbio->bi_iter.bi_sector = r10_bio->devs[i].addr;
-
- for (j=0; j < vcnt ; j++) {
- tbio->bi_io_vec[j].bv_offset = 0;
- tbio->bi_io_vec[j].bv_len = PAGE_SIZE;
-
- memcpy(page_address(tbio->bi_io_vec[j].bv_page),
- page_address(fbio->bi_io_vec[j].bv_page),
- PAGE_SIZE);
- }
tbio->bi_end_io = end_sync_write;
+ bio_copy_data(tbio, fbio);
+
d = r10_bio->devs[i].devnum;
atomic_inc(&conf->mirrors[d].rdev->nr_pending);
atomic_inc(&r10_bio->remaining);
@@ -2014,17 +2007,14 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
* that are active
*/
for (i = 0; i < conf->copies; i++) {
- int j, d;
+ int d;
tbio = r10_bio->devs[i].repl_bio;
if (!tbio || !tbio->bi_end_io)
continue;
if (r10_bio->devs[i].bio->bi_end_io != end_sync_write
&& r10_bio->devs[i].bio != fbio)
- for (j = 0; j < vcnt; j++)
- memcpy(page_address(tbio->bi_io_vec[j].bv_page),
- page_address(fbio->bi_io_vec[j].bv_page),
- PAGE_SIZE);
+ bio_copy_data(tbio, fbio);
d = r10_bio->devs[i].devnum;
atomic_inc(&r10_bio->remaining);
md_sync_acct(conf->mirrors[d].replacement->bdev,
--
1.9.1
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