-stable review patch. If anyone has any objections, please let us know. --------------------- From: Jean-Samuel Chenard upstream commit: c9698d6b1a90929e427a165bd8283f803f57d9bd Mapping of physical memory in UIO needs pgprot_noncached() to ensure that IO memory is not cached. Without pgprot_noncached(), it (accidentally) works on x86 and arm, but fails on PPC. Signed-off-by: Jean-Samuel Chenard Signed-off-by: Hans J Koch Signed-off-by: Greg Kroah-Hartman Signed-off-by: Chris Wright --- drivers/uio/uio.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -447,6 +447,8 @@ static int uio_mmap_physical(struct vm_a vma->vm_flags |= VM_IO | VM_RESERVED; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + return remap_pfn_range(vma, vma->vm_start, idev->info->mem[mi].addr >> PAGE_SHIFT, -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/