linux-kernel - Re: [RFC PATCH 04/37] btrfs: use bio_init

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Date:   Tue, 19 Jan 2021 15:52:28 +0200
From:   Nikolay Borisov <nborisov@...e.com>
To:     Chaitanya Kulkarni <chaitanya.kulkarni@....com>,
        linux-block@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        drbd-dev@...ts.linbit.com, linux-bcache@...r.kernel.org,
        linux-raid@...r.kernel.org, linux-nvme@...ts.infradead.org,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-btrfs@...r.kernel.org, linux-ext4@...r.kernel.org,
        cluster-devel@...hat.com
Cc:     jfs-discussion@...ts.sourceforge.net, dm-devel@...hat.com,
        axboe@...nel.dk, philipp.reisner@...bit.com,
        lars.ellenberg@...bit.com, efremov@...ux.com, colyli@...e.de,
        kent.overstreet@...il.com, agk@...hat.com, snitzer@...hat.com,
        song@...nel.org, hch@....de, sagi@...mberg.me,
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        asml.silence@...il.com, jefflexu@...ux.alibaba.com
Subject: Re: [RFC PATCH 04/37] btrfs: use bio_init_fields in volumes



On 19.01.21 г. 7:05 ч., Chaitanya Kulkarni wrote:
> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@....com>
> ---
>  fs/btrfs/volumes.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index ee086fc56c30..836167212252 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -6371,14 +6371,12 @@ static void submit_stripe_bio(struct btrfs_bio *bbio, struct bio *bio,
>  
>  	bio->bi_private = bbio;
This line can be removed as ->private is initialized by bio_init_fields.

>  	btrfs_io_bio(bio)->device = dev;
> -	bio->bi_end_io = btrfs_end_bio;
> -	bio->bi_iter.bi_sector = physical >> 9;
> +	bio_init_fields(bio, dev->bdev, physical >> 9, bbio, btrfs_end_bio, 0, 0);
>  	btrfs_debug_in_rcu(fs_info,
>  	"btrfs_map_bio: rw %d 0x%x, sector=%llu, dev=%lu (%s id %llu), size=%u",
>  		bio_op(bio), bio->bi_opf, bio->bi_iter.bi_sector,
>  		(unsigned long)dev->bdev->bd_dev, rcu_str_deref(dev->name),
>  		dev->devid, bio->bi_iter.bi_size);
> -	bio_set_dev(bio, dev->bdev);
>  
>  	btrfs_bio_counter_inc_noblocked(fs_info);
>  
>