This patch merges now-identical page table walking and flushing code that had
been duplicated in skas and tt modes.  The differences had been the low-level
address space updating operations, which are now abstracted away in the
respective do_ops functions.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>