[PATCH v3 3/7] mm/gup: remove vmas parameter from get_user_pages_remote()
David Hildenbrand
david at redhat.com
Mon Apr 17 11:01:18 UTC 2023
On 15.04.23 14:09, Lorenzo Stoakes wrote:
> The only instances of get_user_pages_remote() invocations which used the
> vmas parameter were for a single page which can instead simply look up the
> VMA directly. In particular:-
>
> - __update_ref_ctr() looked up the VMA but did nothing with it so we simply
> remove it.
>
> - __access_remote_vm() was already using vma_lookup() when the original
> lookup failed so by doing the lookup directly this also de-duplicates the
> code.
>
> This forms part of a broader set of patches intended to eliminate the vmas
> parameter altogether.
>
> Signed-off-by: Lorenzo Stoakes <lstoakes at gmail.com>
> ---
I guess we should never drop the mmap lock temporarily in these cases,
so it's fine.
Acked-by: David Hildenbrand <david at redhat.com>
--
Thanks,
David / dhildenb
More information about the Linux-security-module-archive
mailing list