[PATCH] alpha gcc4 warnings

on UP smp_call_function() is expanded to expression.  Alpha oprofile
calls that puppy and ignores the return value.  And has -Werror for
arch/*...

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>