[PATCH 2/6] percpu: Add raw_cpu_ops

The following patches will add preemption checks to __this_cpu ops so we need to have an alternative way to use this cpu operations without preemption checks. raw_cpu ops rely on the __this_cpu_xxx_1/2/4/8 operations having no preemption checks. We therefore do not have to duplicate these function

[PATCH 2/6] percpu: Add raw_cpu_ops

The following patches will add preemption checks to __this_cpu ops so we need to have an alternative way to use this cpu operations without preemption checks. raw_cpu ops rely on the __this_cpu_xxx_1/2/4/8 operations having no preemption checks. We therefore do not have to duplicate these function