x86: don't try to allocate from DMA zone at first
If we fail, we'll loop into the allocation again, and then allocate in the DMA zone. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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