44 struct seqlock {  struct
48 typedef struct seqlock seqlock_t;  argument
91 seqlock_init(struct seqlock *seqlock)  in seqlock_init()  argument
98 	mtx_init(&seqlock->seql_lock, "seqlock", NULL, MTX_DEF|MTX_NOWITNESS);  in seqlock_init()
99 	seqcount_init(&seqlock->seql_count);  in seqlock_init()
103 write_seqlock(struct seqlock *seqlock)  in write_seqlock()  argument
105 	mtx_lock(&seqlock->seql_lock);  in write_seqlock()
106 	write_seqcount_begin(&seqlock->seql_count);  in write_seqlock()
110 write_sequnlock(struct seqlock *seqlock)  in write_sequnlock()  argument
112 	write_seqcount_end(&seqlock->seql_count);  in write_sequnlock()
113 	mtx_unlock(&seqlock->seql_lock);  in write_sequnlock()
116 #define	write_seqlock_irqsave(seqlock, flags)	do {	\  argument
118 	write_seqlock(seqlock);				\
122 write_sequnlock_irqrestore(struct seqlock *seqlock,  in write_sequnlock_irqrestore()  argument
125 	write_sequnlock(seqlock);  in write_sequnlock_irqrestore()
129 read_seqbegin(const struct seqlock *seqlock)  in read_seqbegin()  argument
131 	return (read_seqcount_begin(&seqlock->seql_count));  in read_seqbegin()
134 #define	read_seqretry(seqlock, gen)	\  argument
135 	read_seqcount_retry(&(seqlock)->seql_count, gen)