41 struct seqcount {  struct
45 typedef struct seqcount seqcount_t;  argument
48 seqcount_init(struct seqcount *seqcount)  in seqcount_init()  argument
51 	seqcount->sqc_gen = 0;  in seqcount_init()
55 seqcount_destroy(struct seqcount *seqcount)  in seqcount_destroy()  argument
58 	KASSERT((seqcount->sqc_gen & 1) == 0);  in seqcount_destroy()
59 	seqcount->sqc_gen = -1;  in seqcount_destroy()
63 write_seqcount_begin(struct seqcount *seqcount)  in write_seqcount_begin()  argument
66 	KASSERT((seqcount->sqc_gen & 1) == 0);  in write_seqcount_begin()
67 	seqcount->sqc_gen |= 1;  in write_seqcount_begin()
72 write_seqcount_end(struct seqcount *seqcount)  in write_seqcount_end()  argument
75 	KASSERT((seqcount->sqc_gen & 1) == 1);  in write_seqcount_end()
77 	seqcount->sqc_gen |= 1;	/* paranoia */  in write_seqcount_end()
78 	seqcount->sqc_gen++;  in write_seqcount_end()
82 __read_seqcount_begin(const struct seqcount *seqcount)  in __read_seqcount_begin()  argument
86 	while (__predict_false((gen = seqcount->sqc_gen) & 1))  in __read_seqcount_begin()
94 __read_seqcount_retry(const struct seqcount *seqcount, unsigned gen)  in __read_seqcount_retry()  argument
98 	return __predict_false(seqcount->sqc_gen != gen);  in __read_seqcount_retry()
102 read_seqcount_begin(const struct seqcount *seqcount)  in read_seqcount_begin()  argument
106 	gen = __read_seqcount_begin(seqcount);  in read_seqcount_begin()
113 read_seqcount_retry(const struct seqcount *seqcount, unsigned gen)  in read_seqcount_retry()  argument
117 	return __read_seqcount_retry(seqcount, gen);  in read_seqcount_retry()
121 raw_read_seqcount(const struct seqcount *seqcount)  in raw_read_seqcount()  argument
125 	gen = seqcount->sqc_gen;  in raw_read_seqcount()
133 	struct seqcount		sql_count;