btrfs: factor out a btrfs_csum_ptr helper

Add a helper to find the csum for a byte offset into the csum buffer.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2022-05-22 13:47:52 +02:00 • committed by David Sterba
commit a89ce08ce6
2 changed files with 11 additions and 10 deletions