Allow cacheable mmaps of legacy_mem if WB access is supported for the region. The "legacy_mem" file often contains a shadow option ROM, and some versions of X depend on this. Tim Yamin <plasm@xxxxxxxxx> reported that this change fixes X on a Dell PowerEdge 3250. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx> Index: work-mm10/arch/ia64/pci/pci.c =================================================================== --- work-mm10.orig/arch/ia64/pci/pci.c 2007-03-21 14:13:22.000000000 -0700 +++ work-mm10/arch/ia64/pci/pci.c 2007-03-21 14:15:01.000000000 -0700 @@ -656,8 +656,6 @@ return -EINVAL; prot = phys_mem_access_prot(NULL, vma->vm_pgoff, size, vma->vm_page_prot); - if (pgprot_val(prot) != pgprot_val(pgprot_noncached(vma->vm_page_prot))) - return -EINVAL; addr = pci_get_legacy_mem(bus); if (IS_ERR(addr)) - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
|