AMD IOMMU: avoid unnecessary low zone allocation in alloc_coherent

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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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FUJITA Tomonori 2008-09-10 20:19:40 +09:00 • committed by Ingo Molnar

parent 38ddf41b19

commit 13d9fead3d

1 changed files with 3 additions and 2 deletions

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arch/x86/kernel/amd_iommu.c

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