This reference to the long gone Documentation/smp.tex somehow evaded
Randy's cleanup from circa March.  This marks off the last of those stale
references.
Signed-off-by: Arthur Othieno <a.othieno@bluewin.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>