Messages in this thread | | | From | Michael Ellerman <> | Subject | Re: [PATCH 02/15] mm, dax: introduce pfn_t_special() | Date | Fri, 03 Nov 2017 13:32:44 +1100 |
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Dan Williams <dan.j.williams@intel.com> 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
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