xfs: speed up xfs_iwalk_adjust_start a little bit

Replace the open-coded loop that recomputes freecount with a single call
to a bit weight function.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2024-02-22 12:30:44 -08:00
commit ae05eb1171