On Wed, Jan 14, 2015 at 05:47:12PM +0100, Philipp Reisner wrote:
> From: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
>
> This was not noticed for many years. Affects operation if
> md raid is used a backing device for DRBD.
>
> In upstream this is commit 3b9d35d744bb5139f9fed57f38c019bb8c7d351c
>
> CC: stable@xxxxxxxxxx # v3.2+
> Signed-off-by: Philipp Reisner <philipp.reisner@xxxxxxxxxx>
> Signed-off-by: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
> Signed-off-by: Jens Axboe <axboe@xxxxxx>
> ---
> drivers/block/drbd/drbd_req.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
> index c24379f..3dd26a2 100644
> --- a/drivers/block/drbd/drbd_req.c
> +++ b/drivers/block/drbd/drbd_req.c
> @@ -1309,6 +1309,7 @@ int drbd_merge_bvec(struct request_queue *q, struct bvec_merge_data *bvm, struct
> struct request_queue * const b =
> mdev->ldev->backing_bdev->bd_disk->queue;
> if (b->merge_bvec_fn) {
> + bvm->bi_bdev = device->ldev->backing_bdev;
> backing_limit = b->merge_bvec_fn(b, bvm, bvec);
> limit = min(limit, backing_limit);
> }
This breaks the build on 3.14, so I'm guessing it's only for 3.10? Can
you provide a version for 3.14-stable as well?
thanks,
greg k-h
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