On Sun, Jul 01, 2018 at 09:10:57AM -0700, Dan Williams wrote:
> I think we also need the following clue bat for people like me in the future:
>
> diff --git a/mm/gup.c b/mm/gup.c
> index b70d7ba7cc13..388a5c799fa5 100644
> +++ b/mm/gup.c
> @@ -873,6 +873,8 @@ static __always_inline long
> __get_user_pages_locked(struct task_struct *ts
> long ret, pages_done;
> bool lock_dropped;
>
> + lockdep_assert_held_read(&mm->mmap_sem);
> +
> if (locked) {
> /* if VM_FAULT_RETRY can be returned, vmas become invalid */
> BUG_ON(vmas);
Yes please, I had the same thought..
Dan, can you make this happen?
Jason
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