This patchset introduces preemption checks for __this_cpu operations.
First we add new raw_cpu operations that perform this cpu operations
without preempt checks.
The second patch then adds the preempt checks by modifying the
__this_cpu macros in include/linux/percpu.h
V1->V2:
- Reuse preemption check logic in lib/smp_processor_id.c
- Add CONFIG_DEBUG_THIS_CPU_OPERATIONS
- Remove conversions to the use of raw_cpu_ops since
these may require some discussion first.
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