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.
