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-rw-r--r--arch/x86/kernel/amd_iommu.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index f405a61..db64482 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -472,8 +472,7 @@ static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom,
****************************************************************************/
static unsigned long dma_mask_to_pages(unsigned long mask)
{
- return (mask >> PAGE_SHIFT) +
- (PAGE_ALIGN(mask & ~PAGE_MASK) >> PAGE_SHIFT);
+ return PAGE_ALIGN(mask) >> PAGE_SHIFT;
}
/*
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