include/linux/part_stat.h

20  * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters and should
28 #define part_stat_get_cpu(part, field, cpu)				\
29 	(per_cpu_ptr((part)->bd_stats, (cpu))->field)
31 #define part_stat_get(part, field)					\
32 	part_stat_get_cpu(part, field, smp_processor_id())
34 #define part_stat_read(part, field)					\
36 	typeof((part)->bd_stats->field) res = 0;			\
39 		res += per_cpu_ptr((part)->bd_stats, _cpu)->field; \
43 static inline void part_stat_set_all(struct block_device *part, int value)
48 		memset(per_cpu_ptr(part->bd_stats, i), value,
52 #define part_stat_read_accum(part, field)				\
53 	(part_stat_read(part, field[STAT_READ]) +			\
54 	 part_stat_read(part, field[STAT_WRITE]) +			\
55 	 part_stat_read(part, field[STAT_DISCARD]))
57 #define __part_stat_add(part, field, addnd)				\
58 	__this_cpu_add((part)->bd_stats->field, addnd)
60 #define part_stat_add(part, field, addnd)	do {			\
61 	__part_stat_add((part), field, addnd);				\
62 	if ((part)->bd_partno)						\
63 		__part_stat_add(bdev_whole(part), field, addnd);	\
66 #define part_stat_dec(part, field)					\
67 	part_stat_add(part, field, -1)
68 #define part_stat_inc(part, field)					\
69 	part_stat_add(part, field, 1)
70 #define part_stat_sub(part, field, subnd)				\
71 	part_stat_add(part, field, -subnd)
73 #define part_stat_local_dec(part, field)				\
74 	local_dec(&(part_stat_get(part, field)))
75 #define part_stat_local_inc(part, field)				\
76 	local_inc(&(part_stat_get(part, field)))
77 #define part_stat_local_read(part, field)				\
78 	local_read(&(part_stat_get(part, field)))
79 #define part_stat_local_read_cpu(part, field, cpu)			\
80 	local_read(&(part_stat_get_cpu(part, field, cpu)))