seqlock_t
seqlock_t seqlock;
write_seqlock(seqlock_t *sl)
__write_seqlock_irqsave(seqlock_t *sl)
write_sequnlock(seqlock_t *sl)
__write_sequnlock_irqrestore(seqlock_t *sl)
read_seqbegin(seqlock_t *sl)
read_seqretry(seqlock_t *sl, unsigned int pos)
seqlock_init(seqlock_t *sl, int wantipl)