On Mon, Dec 11, 2017 at 04:38:48PM +0200, Nikolay Borisov wrote:
> This code was added in 492bb6deee34 ("Btrfs: Hold a reference on bios
> during submit_bio, add some extra bio checks"). However, holding a
> reference on a bio is necessary only if it's going to be referenced
> after the submit_bio returns and the bio is completed. In this
> particular instance this is not the case so there is no need to hold
> an extra reference since we directly return.
>
Looks good. If possible, please also drop other unnecessary bio_get()
in btrfs.
Reviewed-by: Liu Bo <bo.li.liu@xxxxxxxxxx>
-liubo
> Signed-off-by: Nikolay Borisov <nborisov@xxxxxxxx>
> ---
> fs/btrfs/volumes.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index 49810b70afd3..13827ff648ec 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -6069,9 +6069,7 @@ static noinline void btrfs_schedule_bio(struct btrfs_device *device,
>
> /* don't bother with additional async steps for reads, right now */
> if (bio_op(bio) == REQ_OP_READ) {
> - bio_get(bio);
> btrfsic_submit_bio(bio);
> - bio_put(bio);
> return;
> }
>
> --
> 2.7.4
>
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