block: add a bdev_nr_bytes helper

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Add a helper to query the size of a block device in bytes.  This
will be used to remove open coded access to ->bd_inode.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20211018101130.1838532-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2021-10-18 12:11:02 +02:00 • committed by Jens Axboe

parent 99457db8b4

commit 6436bd90f7

1 changed files with 6 additions and 1 deletions

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7

include/linux/genhd.h

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