On 04.04.24 09:26, Vivek Kasireddy wrote:
These helpers are the folio versions of unpin_user_page/unpin_user_pages.
They are currently only useful for unpinning folios pinned by
memfd_pin_folios() or other associated routines. However, they could
find new uses in the future, when more and more folio-only helpers
are added to GUP.
We should probably sanity check the folio as part of unpin similar
to how it is done in unpin_user_page/unpin_user_pages but we cannot
cleanly do that at the moment without also checking the subpage.
Therefore, sanity checking needs to be added to these routines once
we have a way to determine if any given folio is anon-exclusive (via
a per folio AnonExclusive flag).
Cc: David Hildenbrand <da...@redhat.com>
Cc: Matthew Wilcox <wi...@infradead.org>
Cc: Christoph Hellwig <h...@infradead.org>
Cc: Jason Gunthorpe <j...@nvidia.com>
Cc: Peter Xu <pet...@redhat.com>
Suggested-by: David Hildenbrand <da...@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasire...@intel.com>
---
Reviewed-by: David Hildenbrand <da...@redhat.com>
--
Cheers,
David / dhildenb
