Looks good.

Reviewed-by: Chaitanya Kulkarni <[email protected]>

On 06/26/2019 06:49 AM, Christoph Hellwig wrote:
> Use bio_release_pages instead of duplicating it.
>
> Signed-off-by: Christoph Hellwig <[email protected]>
> ---
>   fs/direct-io.c | 15 +++------------
>   1 file changed, 3 insertions(+), 12 deletions(-)
>
> diff --git a/fs/direct-io.c b/fs/direct-io.c
> index ac7fb19b6ade..ae196784f487 100644
> --- a/fs/direct-io.c
> +++ b/fs/direct-io.c
> @@ -538,8 +538,8 @@ static struct bio *dio_await_one(struct dio *dio)
>    */
>   static blk_status_t dio_bio_complete(struct dio *dio, struct bio *bio)
>   {
> -     struct bio_vec *bvec;
>       blk_status_t err = bio->bi_status;
> +     bool should_dirty = dio->op == REQ_OP_READ && dio->should_dirty;
>
>       if (err) {
>               if (err == BLK_STS_AGAIN && (bio->bi_opf & REQ_NOWAIT))
> @@ -548,19 +548,10 @@ static blk_status_t dio_bio_complete(struct dio *dio, 
> struct bio *bio)
>                       dio->io_error = -EIO;
>       }
>
> -     if (dio->is_async && dio->op == REQ_OP_READ && dio->should_dirty) {
> +     if (dio->is_async && should_dirty) {
>               bio_check_pages_dirty(bio);     /* transfers ownership */
>       } else {
> -             struct bvec_iter_all iter_all;
> -
> -             bio_for_each_segment_all(bvec, bio, iter_all) {
> -                     struct page *page = bvec->bv_page;
> -
> -                     if (dio->op == REQ_OP_READ && !PageCompound(page) &&
> -                                     dio->should_dirty)
> -                             set_page_dirty_lock(page);
> -                     put_page(page);
> -             }
> +             bio_release_pages(bio, should_dirty);
>               bio_put(bio);
>       }
>       return err;
>

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