Merge branch 'drm-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied...

[linux-drm-fsl-dcu.git] / arch / x86_64 / kernel / pci-swiotlb.c

diff --git a/arch/x86_64/kernel/pci-swiotlb.c b/arch/x86_64/kernel/pci-swiotlb.c
index ebdb77fe20573702facc612fd1262ab3e3d93ade..4b4569abc60c8d3f3b993d2f1e0f9ee320ea0d82 100644 (file)
--- a/arch/x86_64/kernel/pci-swiotlb.c
+++ b/arch/x86_64/kernel/pci-swiotlb.c
@@ -3,7 +3,8 @@
 #include <linux/pci.h>
 #include <linux/cache.h>
 #include <linux/module.h>
-#include <asm/dma-mapping.h>
+#include <linux/dma-mapping.h>
+
 #include <asm/proto.h>
 #include <asm/swiotlb.h>
 #include <asm/dma.h>
@@ -11,7 +12,7 @@
 int swiotlb __read_mostly;
 EXPORT_SYMBOL(swiotlb);
 
-struct dma_mapping_ops swiotlb_dma_ops = {
+const struct dma_mapping_ops swiotlb_dma_ops = {
        .mapping_error = swiotlb_dma_mapping_error,
        .alloc_coherent = swiotlb_alloc_coherent,
        .free_coherent = swiotlb_free_coherent,
@@ -28,12 +29,13 @@ struct dma_mapping_ops swiotlb_dma_ops = {
        .dma_supported = NULL,
 };
 
-void pci_swiotlb_init(void)
+void __init pci_swiotlb_init(void)
 {
        /* don't initialize swiotlb if iommu=off (no_iommu=1) */
-       if (!iommu_detected && !no_iommu &&
-           (end_pfn > MAX_DMA32_PFN || force_iommu))
+       if (!iommu_detected && !no_iommu && end_pfn > MAX_DMA32_PFN)
               swiotlb = 1;
+       if (swiotlb_force)
+               swiotlb = 1;
        if (swiotlb) {
                printk(KERN_INFO "PCI-DMA: Using software bounce buffering for IO (SWIOTLB)\n");
                swiotlb_init();