SMP fix --
    for_each_domain() is not defined if not CONFIG_SMP, so show_schedstat
    needed a couple of extra ifdefs.
Signed-off-by: Rick Lindsley <ricklind@us.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>