Fix the issue that the timer sometimes will not fire if the scheduled time
has already expired.  Plus some simplifications and style changes.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>