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References: <20210126145247.1964410-1-hch@lst.de> <20210126145247.1964410-14-hch@lst.de>
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From:   Song Liu <song@kernel.org>
Date:   Tue, 26 Jan 2021 23:22:46 -0800
Message-ID: <CAPhsuW4AViTNjq1mp6zvbEJ8zKdK7__BfXEsvATTBWraK2u1Jg@mail.gmail.com>
Subject: Re: [PATCH 13/17] md: remove md_bio_alloc_sync
To:     Christoph Hellwig <hch@lst.de>
Cc:     Jens Axboe <axboe@kernel.dk>, Jaegeuk Kim <jaegeuk@kernel.org>,
        Chao Yu <chao@kernel.org>,
        Philipp Reisner <philipp.reisner@linbit.com>,
        Lars Ellenberg <lars.ellenberg@linbit.com>,
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        Josef Bacik <josef@toxicpanda.com>,
        David Sterba <dsterba@suse.com>,
        Damien Le Moal <damien.lemoal@wdc.com>,
        Naohiro Aota <naohiro.aota@wdc.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Ryusuke Konishi <konishi.ryusuke@gmail.com>,
        linux-nilfs@vger.kernel.org, dm-devel@redhat.com,
        linux-f2fs-devel@lists.sourceforge.net,
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On Tue, Jan 26, 2021 at 7:17 AM Christoph Hellwig <hch@lst.de> wrote:
>
> md_bio_alloc_sync is never called with a NULL mddev, and ->sync_set is
> initialized in md_run, so it always must be initialized as well.  Just
> open code the remaining call to bio_alloc_bioset.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Acked-by: Song Liu <song@kernel.org>

> ---
>  drivers/md/md.c | 10 +---------
>  1 file changed, 1 insertion(+), 9 deletions(-)
>
> diff --git a/drivers/md/md.c b/drivers/md/md.c
> index 6a27f52007c871..399c81bddc1ae1 100644
> --- a/drivers/md/md.c
> +++ b/drivers/md/md.c
> @@ -340,14 +340,6 @@ static int start_readonly;
>   */
>  static bool create_on_open = true;
>
> -static struct bio *md_bio_alloc_sync(struct mddev *mddev)
> -{
> -       if (!mddev || !bioset_initialized(&mddev->sync_set))
> -               return bio_alloc(GFP_NOIO, 1);
> -
> -       return bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set);
> -}
> -
>  /*
>   * We have a system wide 'event count' that is incremented
>   * on any 'interesting' event, and readers of /proc/mdstat
> @@ -989,7 +981,7 @@ void md_super_write(struct mddev *mddev, struct md_rdev *rdev,
>         if (test_bit(Faulty, &rdev->flags))
>                 return;
>
> -       bio = md_bio_alloc_sync(mddev);
> +       bio = bio_alloc_bioset(GFP_NOIO, 1, &mddev->sync_set);
>
>         atomic_inc(&rdev->nr_pending);
>
> --
> 2.29.2
>