Re: [PATCH 1/2] vmsplice: unmap gifted pages for recipient

[Dave Hansen]

On 10/07/2013 01:21 PM, Robert C Jennings wrote:
> +					} else {
> +						if (vma)
> +							zap_page_range(vma,
> +								user_start,
> +								(user_end -
> +								 user_start),
> +								NULL);
> +						vma = find_vma_intersection(
> +								current->mm,
> +								useraddr,
> +								(useraddr +
> +								 PAGE_SIZE));
> +						if (!IS_ERR_OR_NULL(vma)) {
> +							user_start = useraddr;
> +							user_end = (useraddr +
> +								    PAGE_SIZE);
> +						} else
> +							vma = NULL;
> +					}

This is pretty unspeakably hideous.  Was there truly no better way to do
this?
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