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[Xen-devel] [RFC PATCH v2 04/12] drivers/iommu/amd_iommu: update usage of address zone modifiers

From: Huaisheng Ye <yehs1@xxxxxxxxxx>

Use __GFP_ZONE_MASK to replace (__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32).

___GFP_DMA, ___GFP_HIGHMEM and ___GFP_DMA32 have been deleted from GFP
bitmasks, the bottom three bits of GFP mask is reserved for storing
encoded zone number.
__GFP_DMA, __GFP_HIGHMEM and __GFP_DMA32 should not be operated by OR.

Signed-off-by: Huaisheng Ye <yehs1@xxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
 drivers/iommu/amd_iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 74788fd..3921d53 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2614,7 +2614,7 @@ static void *alloc_coherent(struct device *dev, size_t 
        dma_dom   = to_dma_ops_domain(domain);
        size      = PAGE_ALIGN(size);
        dma_mask  = dev->coherent_dma_mask;
-       flag     &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
+       flag     &= ~__GFP_ZONE_MASK;
        flag     |= __GFP_ZERO;
        page = alloc_pages(flag | __GFP_NOWARN,  get_order(size));

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