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SubjectRe: [patch] mm, page_alloc: set num_movable in move_freepages()
On Fri, 5 Oct 2018 13:56:39 -0700 (PDT) David Rientjes <rientjes@google.com> wrote:

> If move_freepages() returns 0 because zone_spans_pfn(), *num_movable can

move_free_pages_block()? !zone_spans_pfn()?

> hold the value from the stack because it does not get initialized in
> move_freepages().
>
> Move the initialization to move_freepages_block() to guarantee the value
> actually makes sense.
>
> This currently doesn't affect its only caller where num_movable != NULL,
> so no bug fix, but just more robust.
>
> ...

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