Dan Williams <dan.j.williams@xxxxxxxxx> writes: > In support of removing the VM_MIXEDMAP indication from DAX VMAs, > introduce pfn_t_special() for drivers to indicate that _PAGE_SPECIAL > should be used for DAX ptes. This also helps identify drivers like > dccssblk that only want to use DAX in a read-only fashion without > get_user_pages() support. > > Ideally we could delete axonram and dcssblk DAX support, but if we need > to keep it better make it explicit that axonram and dcssblk only support > a sub-set of DAX due to missing _PAGE_DEVMAP support. I sent a patch to remove axonram (sorry meant to Cc you): http://patchwork.ozlabs.org/patch/833588/ Will see if there's any feedback. cheers
