tick/sched: Optimize tick_do_update_jiffies64() further

Now that it's clear that there is always one tick to account, simplify the
calculations some more.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201117132006.565663056@linutronix.de
This commit is contained in:
Thomas Gleixner 2020-11-17 14:19:47 +01:00
commit 7a35bf2a6a