Re: [PATCH 22/30] reiserfs: use bdev_nr_bytes instead of open coding it

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Subject: Re: [PATCH 22/30] reiserfs: use bdev_nr_bytes instead of open coding it
From: Kees Cook <keescook@xxxxxxxxxxxx>
Date: Fri, 15 Oct 2021 09:56:47 -0700
Cc: Dave Kleikamp <shaggy@xxxxxxxxxx>, jfs-discussion@xxxxxxxxxxxxxxxxxxxxx, Jan Kara <jack@xxxxxxx>, Mike Snitzer <snitzer@xxxxxxxxxx>, linux-nvme@xxxxxxxxxxxxxxxxxxx, Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx>, Song Liu <song@xxxxxxxxxx>, dm-devel@xxxxxxxxxx, target-devel@xxxxxxxxxxxxxxx, reiserfs-devel@xxxxxxxxxxxxxxx, drbd-dev@xxxxxxxxxxxxxxxx, linux-nilfs@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>, linux-ext4@xxxxxxxxxxxxxxx, Josef Bacik <josef@xxxxxxxxxxxxxx>, Coly Li <colyli@xxxxxxx>, linux-raid@xxxxxxxxxxxxxxx, linux-bcache@xxxxxxxxxxxxxxx, David Sterba <dsterba@xxxxxxxx>, Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx>, Anton Altaparmakov <anton@xxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, linux-nfs@xxxxxxxxxxxxxxx, "Theodore Ts'o" <tytso@xxxxxxx>, linux-ntfs-dev@xxxxxxxxxxxxxxxxxxxxx, Jan Kara <jack@xxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, Phillip Lougher <phillip@xxxxxxxxxxxxxxx>, ntfs3@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx
In-reply-to: <20211015132643.1621913-23-hch@lst.de>
References: <20211015132643.1621913-1-hch@lst.de> <20211015132643.1621913-23-hch@lst.de>

On Fri, Oct 15, 2021 at 03:26:35PM +0200, Christoph Hellwig wrote:
> Use the proper helper to read the block device size and remove two
> cargo culted checks that can't be false.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook

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References:
- don't use ->bd_inode to access the block device size v2
  - From: Christoph Hellwig
- [PATCH 22/30] reiserfs: use bdev_nr_bytes instead of open coding it
  - From: Christoph Hellwig

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