microblaze/PCI: Remove useless __pci_mmap_set_pgprot()

The microblaze __pci_mmap_set_pgprot() was apparently copied from powerpc,
where it computes either an uncacheable pgprot_t or a write-combining one.
But on microblaze, we always use the regular uncacheable pgprot_t.

Remove the useless code in __pci_mmap_set_pgprot() and inline it at the
only call site.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>

diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 14cba600da7ae4fff9573cfcb27465e8f322e73d..1974567f3b4ba99a3479be585d06cd2c5c22c06d 100644 (file)
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -218,33 +218,6 @@ static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
        return NULL;
 }
 
-/*
- * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
- * device mapping.
- */
-static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
-                                     pgprot_t protection,
-                                     enum pci_mmap_state mmap_state,
-                                     int write_combine)
-{
-       pgprot_t prot = protection;
-
-       /* Write combine is always 0 on non-memory space mappings. On
-        * memory space, if the user didn't pass 1, we check for a
-        * "prefetchable" resource. This is a bit hackish, but we use
-        * this to workaround the inability of /sysfs to provide a write
-        * combine bit
-        */
-       if (mmap_state != pci_mmap_mem)
-               write_combine = 0;
-       else if (write_combine == 0) {
-               if (rp->flags & IORESOURCE_PREFETCH)
-                       write_combine = 1;
-       }
-
-       return pgprot_noncached(prot);
-}
-
 /*
  * This one is used by /dev/mem and fbdev who have no clue about the
  * PCI device, it tries to find the PCI device first and calls the
@@ -317,9 +290,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
                return -EINVAL;
 
        vma->vm_pgoff = offset >> PAGE_SHIFT;
-       vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
-                                                 vma->vm_page_prot,
-                                                 mmap_state, write_combine);
+       vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 
        ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
                               vma->vm_end - vma->vm_start, vma->vm_page_prot);