__preempt_count_sub
__preempt_count_sub(NMI_OFFSET + HARDIRQ_OFFSET); \
#define preempt_count_sub(val) __preempt_count_sub(val)
#define __preempt_count_dec() __preempt_count_sub(1)
__preempt_count_sub(val);
__preempt_count_sub(cnt);
__preempt_count_sub(cnt - 1);