We dont use the hardware referenced and changed bits and setting them early
avoids a store to memory.  We already do this for userspace hptes but not
kernel ones.  Do it.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>