__this_cpu_preempt_check
extern void __this_cpu_preempt_check(const char *op);
__this_cpu_preempt_check("read"); \
__this_cpu_preempt_check("write"); \
__this_cpu_preempt_check("add"); \
__this_cpu_preempt_check("and"); \
__this_cpu_preempt_check("or"); \
__this_cpu_preempt_check("add_return"); \
__this_cpu_preempt_check("xchg"); \
__this_cpu_preempt_check("cmpxchg"); \
__this_cpu_preempt_check("try_cmpxchg"); \
EXPORT_SYMBOL(__this_cpu_preempt_check);