tick-sched: Remove last_tick and calculate next tick from now
During tick restart, we use last_tick and forward it past now.
Since we are forwarding past now, we can simply use now as a reference
instead of last_tick. This patch removes last_tick and does so.
This patch potentially does more mul/imul than the existing code,
as sometimes forwarding past now need not be done if last_tick > now.
However, the patch is a cleanup which reduces LOC and reduces the size
of struct tick_sched.
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
2 files changed
