On 14.05.23 23:26, Lorenzo Stoakes wrote:
Now that the GUP explicitly checks FOLL_LONGTERM pin_user_pages() for broken file-backed mappings in "mm/gup: disallow FOLL_LONGTERM GUP-nonfast writing to file-backed mappings", there is no need to explicitly check VMAs for this condition, so simply remove this logic from io_uring altogether.
Worth adding "Note that this change will make iouring fixed buffers work on MAP_PRIVATE file mappings."
I'll run my test cases with this series and expect no surprises :) Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> -- Thanks, David / dhildenb
