Re: [PATCH] mm: fix status code move_pages() returns for zero page

[Christoph Lameter]

On Wed, 24 Jun 2015, Kirill A. Shutemov wrote:

> Man page for move_pages(2) specifies that status code for zero page is
> supposed to be -EFAULT. Currently kernel return -ENOENT in this case.
>
> follow_page() can do it for us, if we would ask for FOLL_DUMP.

FOLL_DUMP also has the consequence that the upper layer page tables pages
are no longer allocated.

Otherwise this looks ok.

Reviewed-by: Christoph Lameter <cl@xxxxxxxxx>
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