[PATCH 2/3] nohz,cputime: replace VTIME_GEN irq time code with IRQ_TIME_ACCOUNTING code

From: Rik van Riel The CONFIG_VIRT_CPU_ACCOUNTING_GEN irq time tracking code does not appear to currently work right. On CPUs without nohz_full=, only tick based irq time sampling is done, which breaks down when dealing with a nohz_idle CPU. On firewalls and similar systems,

[PATCH 2/3] nohz,cputime: replace VTIME_GEN irq time code with IRQ_TIME_ACCOUNTING code

From: Rik van Riel The CONFIG_VIRT_CPU_ACCOUNTING_GEN irq time tracking code does not appear to currently work right. On CPUs without nohz_full=, only tick based irq time sampling is done, which breaks down when dealing with a nohz_idle CPU. On firewalls and similar systems, no ticks may