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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-09-17 12:17:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-19 12:59:26 +0200 |
| commit | 6754086ce67c0a1f5d7eac612102368781e14588 (patch) | |
| tree | 94ae6594ae234a0c05bc0496017c8e9084f46167 | |
| parent | c97ac5359e6897abe22770740294dda185bac30d (diff) | |
AMD IOMMU: simplify dma_mask_to_pages
The current calculation is very complicated. This patch replaces it with
a much simpler version.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index f405a61f61f..db64482b179 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; } /* |