[SPARC]: Respect vm_page_prot in io_remap_page_range().

    Make sure the callers do a pgprot_noncached() on
    vma->vm_page_prot.

    Pointed out by Hugh Dickens.

Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/linux-core/drm_vm.c b/linux-core/drm_vm.c
index 4f6a20e..a65fbc7 100644 (file)
--- a/linux-core/drm_vm.c
+++ b/linux-core/drm_vm.c
@@ -829,6 +829,7 @@ int drm_mmap(struct file *filp, struct vm_area_struct *vma)
                vma->vm_flags |= VM_IO; /* not in core dump */
                vma->vm_page_prot = drm_io_prot(map->type, vma);
 #ifdef __sparc__
+               vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
                if (io_remap_pfn_range(vma, vma->vm_start,
                                        (map->offset + offset) >>PAGE_SHIFT,
                                        vma->vm_end - vma->vm_start,