[PATCH] mm: support __GFP_REPEAT in kvmalloc_node

[Michal Hocko]

While checking opencoded users I've encountered that vhost code would
really like to use kvmalloc with __GFP_REPEAT [1] so the following patch
adds support for __GFP_REPEAT and converts both vhost users.

So currently I am sitting on 3 patches. I will wait for more feedback -
especially about potential split ups or cleanups few more days and then
repost the whole series.

[1] http://lkml.kernel.org/r/20170104150800.GO25453@xxxxxxxxxxxxxx
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