On Fri, 13 Apr 2012, Sasha Levin wrote:
> Commit 3268c63 ("mm: fix move/migrate_pages() race on task struct") has added
> an odd construct where 'mm' is checked for being NULL, and if it is, it would
> get dereferenced anyways by mput()ing it.
Acked-by: Christoph Lameter <cl@xxxxxxxxx>
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