PREEMPT_CHECK_OFFSET   93 include/linux/preempt_mask.h #define SOFTIRQ_LOCK_OFFSET (SOFTIRQ_DISABLE_OFFSET + PREEMPT_CHECK_OFFSET)
PREEMPT_CHECK_OFFSET  109 include/linux/preempt_mask.h 		((preempt_count() & ~PREEMPT_ACTIVE) != PREEMPT_CHECK_OFFSET)