powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED

[karo-tx-linux.git] / arch / powerpc / kernel / pci-common.c

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 1a32db331a5c0aa576d04d717c998ae2b460f367..2538030954d85102c3ac929b076ad3979d98a4c1 100644 (file)
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -370,13 +370,10 @@ static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
        }
 
        /* XXX would be nice to have a way to ask for write-through */
-       prot |= _PAGE_NO_CACHE;
        if (write_combine)
-               prot &= ~_PAGE_GUARDED;
+               return pgprot_noncached_wc(prot);
        else
-               prot |= _PAGE_GUARDED;
-
-       return __pgprot(prot);
+               return pgprot_noncached(prot);
 }
 
 /*
@@ -387,19 +384,17 @@ static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
 pgprot_t pci_phys_mem_access_prot(struct file *file,
                                  unsigned long pfn,
                                  unsigned long size,
-                                 pgprot_t protection)
+                                 pgprot_t prot)
 {
        struct pci_dev *pdev = NULL;
        struct resource *found = NULL;
-       unsigned long prot = pgprot_val(protection);
        resource_size_t offset = ((resource_size_t)pfn) << PAGE_SHIFT;
        int i;
 
        if (page_is_ram(pfn))
-               return __pgprot(prot);
-
-       prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
+               return prot;
 
+       prot = pgprot_noncached(prot);
        for_each_pci_dev(pdev) {
                for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
                        struct resource *rp = &pdev->resource[i];
@@ -420,14 +415,14 @@ pgprot_t pci_phys_mem_access_prot(struct file *file,
        }
        if (found) {
                if (found->flags & IORESOURCE_PREFETCH)
-                       prot &= ~_PAGE_GUARDED;
+                       prot = pgprot_noncached_wc(prot);
                pci_dev_put(pdev);
        }
 
        pr_debug("PCI: Non-PCI map for %llx, prot: %lx\n",
-                (unsigned long long)offset, prot);
+                (unsigned long long)offset, pgprot_val(prot));
 
-       return __pgprot(prot);
+       return prot;
 }
 
 
@@ -583,8 +578,7 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus,
        pr_debug(" -> mapping phys %llx\n", (unsigned long long)offset);
 
        vma->vm_pgoff = offset >> PAGE_SHIFT;
-       vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
-                                    | _PAGE_NO_CACHE | _PAGE_GUARDED);
+       vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
        return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
                               vma->vm_end - vma->vm_start,
                               vma->vm_page_prot);