Alistair Popple wrote: > PFN_DEV was used by callers of dax_direct_access() to figure out if the > returned PFN is associated with a page using pfn_t_has_page() or > not. However all DAX PFNs now require an assoicated ZONE_DEVICE page so can > assume a page exists. > > Other users of PFN_DEV were setting it before calling > vmf_insert_mixed(). This is unnecessary as it is no longer checked, instead > relying on pfn_valid() to determine if there is an associated page or not. > > Signed-off-by: Alistair Popple <apopple@xxxxxxxxxx> > Reviewed-by: Christoph Hellwig <hch@xxxxxx> Looks good, Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
