On Tue, Aug 10, 2021 at 03:28:51PM +1000, Dave Chinner wrote:

From: Dave Chinner <redacted>

TO stop external users from using b_bn as the disk address of the
buffer, rename it to b_index to indicate that it is the buffer cache
index, not the block number of the buffer. Code that needs the disk
address should use xfs_buf_daddr() to obtain it.

Do the rename and clean up any of the remaining b_bn cruft that is
left over and is now unused.

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>

Although the XFS_BUF_SET_ADDR really is a separate thing and should
probably have been a separate patch.