linux-ext4 - Re: [PATCH block/for-next v2 07/16] bcachefs: use new helper to get inode from block

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Date: Mon, 27 Nov 2023 16:09:47 +0900
From: Damien Le Moal <dlemoal@...nel.org>
To: Yu Kuai <yukuai1@...weicloud.com>, hch@...radead.org,
 ming.lei@...hat.com, axboe@...nel.dk, roger.pau@...rix.com, colyli@...e.de,
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 jejb@...ux.ibm.com, martin.petersen@...cle.com, clm@...com,
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Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
 xen-devel@...ts.xenproject.org, linux-bcache@...r.kernel.org,
 linux-mtd@...ts.infradead.org, linux-s390@...r.kernel.org,
 linux-scsi@...r.kernel.org, linux-bcachefs@...r.kernel.org,
 linux-btrfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
 linux-erofs@...ts.ozlabs.org, linux-ext4@...r.kernel.org,
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 yangerkun@...wei.com
Subject: Re: [PATCH block/for-next v2 07/16] bcachefs: use new helper to get
 inode from block_device

On 11/27/23 15:21, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@...wei.com>
> 
> Which is more efficiency, and also prepare to remove the field
> 'bd_inode' from block_device.
> 
> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> ---
>  fs/bcachefs/util.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/bcachefs/util.h b/fs/bcachefs/util.h
> index 2984b57b2958..fe7ccb3a3517 100644
> --- a/fs/bcachefs/util.h
> +++ b/fs/bcachefs/util.h
> @@ -518,7 +518,7 @@ int bch2_bio_alloc_pages(struct bio *, size_t, gfp_t);
>  
>  static inline sector_t bdev_sectors(struct block_device *bdev)
>  {
> -	return bdev->bd_inode->i_size >> 9;
> +	return bdev_inode(bdev)->i_size >> 9;

shouldn't this use i_size_read() ?

I missed the history with this but why not use bdev_nr_sectors() and delete this
helper ?

>  }
>  
>  #define closure_bio_submit(bio, cl)					\

-- 
Damien Le Moal
Western Digital Research