xfs: split xfs_bmap_btalloc_nullfb

Split xfs_bmap_btalloc_nullfb into one function for filestream allocations
and one for everything else that share a few helpers.  This dramatically
simplifies the control flow.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2014-04-23 07:11:41 +10:00 • committed by Dave Chinner
commit c977eb1065