Merge tag 'dax-fixes-5.6-rc1' of git://

Pull dax fixes from Dan Williams:
 "A fix for an xfstest failure and some and an update that removes an
  fsdax dependency on block devices.


   - Fix RWF_NOWAIT writes to properly return -EAGAIN

   - Clean up an unused helper

   - Update dax_writeback_mapping_range to not need a block_device

* tag 'dax-fixes-5.6-rc1' of git://
  dax: pass NOWAIT flag to iomap_apply
  dax: Get rid of fs_dax_get_by_host() helper
  dax: Pass dax_dev instead of bdev to dax_writeback_mapping_range()