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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-11-15 21:19:53 +0900
committerIngo Molnar <mingo@elte.hu>2009-11-17 07:53:21 +0100
commit8fd524b355daef0945692227e726fb444cebcd4f (patch)
treed9c067e6e2693d46b70010a4ed2910205a59c92d /arch/x86/kernel/pci-dma.c
parent42109197eb7c01080eea6d9cd48ca23cbc3c566c (diff)
downloadop-kernel-dev-8fd524b355daef0945692227e726fb444cebcd4f.zip
op-kernel-dev-8fd524b355daef0945692227e726fb444cebcd4f.tar.gz
x86: Kill bad_dma_address variable
This kills bad_dma_address variable, the old mechanism to enable IOMMU drivers to make dma_mapping_error() work in IOMMU's specific way. bad_dma_address variable was introduced to enable IOMMU drivers to make dma_mapping_error() work in IOMMU's specific way. However, it can't handle systems that use both swiotlb and HW IOMMU. SO we introduced dma_map_ops->mapping_error to solve that case. Intel VT-d, GART, and swiotlb already use dma_map_ops->mapping_error. Calgary, AMD IOMMU, and nommu use zero for an error dma address. This adds DMA_ERROR_CODE and converts them to use it (as SPARC and POWER does). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: muli@il.ibm.com Cc: joerg.roedel@amd.com LKML-Reference: <1258287594-8777-3-git-send-email-fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/pci-dma.c')
-rw-r--r--arch/x86/kernel/pci-dma.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index bf621b9..afcc58b 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -43,9 +43,6 @@ int iommu_detected __read_mostly = 0;
*/
int iommu_pass_through __read_mostly;
-dma_addr_t bad_dma_address __read_mostly = 0;
-EXPORT_SYMBOL(bad_dma_address);
-
/* Dummy device used for NULL arguments (normally ISA). */
struct device x86_dma_fallback_dev = {
.init_name = "fallback device",
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