[patch] mempool-2.5.1-D1

[Ingo Molnar]

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there is another thinko in the mempool code, reported by Suparna
Bhattacharya. If mempool_alloc() is called from an IRQ context then we
return too early. The correct behavior is to allocate GFP_ATOMIC, if that
fails then we look at the pool and return an element, or return NULL.

	Ingo

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