[PATCH 08/10] nohz: Fetch timekeeping max deferment only for timekeeper

We fetch it unconditionally from the tick stop code whereas only the timekeeper, or the CPU that carried that duty last, needs it. Fetching the timekeeping max deferment should be lightweight but it still involves a few read side barriers and a seqcount that may well be cache cold for non-timekeep

[PATCH 08/10] nohz: Fetch timekeeping max deferment only for timekeeper

We fetch it unconditionally from the tick stop code whereas only the timekeeper, or the CPU that carried that duty last, needs it. Fetching the timekeeping max deferment should be lightweight but it still involves a few read side barriers and a seqcount that may well be cache cold for non-timekeep