On Wed, Aug 21, 2019 at 01:57:03PM -0400, Vivek Goyal wrote:
Right now dax_writeback_mapping_range() is passed a bdev and dax_dev
is searched from that bdev name.
virtio-fs does not have a bdev. So pass in dax_dev also to
dax_writeback_mapping_range(). If dax_dev is passed in, bdev is not
used otherwise dax_dev is searched using bdev.
Please just pass in only the dax_device and get rid of the block device.
The callers should have one at hand easily, e.g. for XFS just call
xfs_find_daxdev_for_inode instead of xfs_find_bdev_for_inode.