Re: [PATCH v5 4/6] io_uring: rsrc: delegate VMA file-backed check to GUP

From: Jens Axboe
Date: Mon May 15 2023 - 15:55:46 EST


On 5/14/23 3:26 PM, 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.

Don't have the prerequisite patch handy (not in mainline yet), but if it
just moves the check, then:

Reviewed-by: Jens Axboe <axboe@xxxxxxxxx>

--
Jens Axboe