This removes some unnecessary code in the assembly files.

Matches i386 behaviour.

In addition don't clear the work check mask after work has been done.
This fixes some theoretical signal/other event losses.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>