Ok, here you go Tony.  This one fixes the loop and also fixes drm_vm.c.  All
of the bits aside from the efi.h bit are ia64 specific (either under
arch/ia64 or __ia64__), so your tree is probably the right place for all of
it.
 
This patch adds efi_range_is_wc() to efi.h.  It's used to determine whether an
address range can be mapped with the write coalescing attribute.  It also
fixes up some ia64 specific callers to use the new routine instead of
unconditionally calling pgprot_writecombined, which can be dangerous if used
on ranges that don't support it.
Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>