From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Wed, 10 Sep 2008 11:19:40 +0000 (+0900)
Subject: AMD IOMMU: avoid unnecessary low zone allocation in alloc_coherent
X-Git-Tag: v2.6.28-rc1~712^2^4~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13d9fead3daa0efa1b8bb6ae59650e4453b39128;p=pandora-kernel.git

AMD IOMMU: avoid unnecessary low zone allocation in alloc_coherent

x86's common alloc_coherent (dma_alloc_coherent in dma-mapping.h) sets
up the gfp flag according to the device dma_mask but AMD IOMMU doesn't
need it for devices that the IOMMU can do virtual mappings for. This
patch avoids unnecessary low zone allocation.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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