1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_PART_STAT_H 2 #ifndef _LINUX_PART_STAT_H
3 #define _LINUX_PART_STAT_H 3 #define _LINUX_PART_STAT_H
4 4
5 #include <linux/blkdev.h> !! 5 #include <linux/genhd.h>
6 #include <asm/local.h> <<
7 6
8 struct disk_stats { 7 struct disk_stats {
9 u64 nsecs[NR_STAT_GROUPS]; 8 u64 nsecs[NR_STAT_GROUPS];
10 unsigned long sectors[NR_STAT_GROUPS]; 9 unsigned long sectors[NR_STAT_GROUPS];
11 unsigned long ios[NR_STAT_GROUPS]; 10 unsigned long ios[NR_STAT_GROUPS];
12 unsigned long merges[NR_STAT_GROUPS]; 11 unsigned long merges[NR_STAT_GROUPS];
13 unsigned long io_ticks; 12 unsigned long io_ticks;
14 local_t in_flight[2]; 13 local_t in_flight[2];
15 }; 14 };
16 15
17 /* 16 /*
18 * Macros to operate on percpu disk statistics 17 * Macros to operate on percpu disk statistics:
19 * 18 *
20 * {disk|part|all}_stat_{add|sub|inc|dec}() mo 19 * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters and should
21 * be called between disk_stat_lock() and disk 20 * be called between disk_stat_lock() and disk_stat_unlock().
22 * 21 *
23 * part_stat_read() can be called at any time. 22 * part_stat_read() can be called at any time.
24 */ 23 */
25 #define part_stat_lock() preempt_disabl 24 #define part_stat_lock() preempt_disable()
26 #define part_stat_unlock() preempt_enable 25 #define part_stat_unlock() preempt_enable()
27 26
28 #define part_stat_get_cpu(part, field, cpu) 27 #define part_stat_get_cpu(part, field, cpu) \
29 (per_cpu_ptr((part)->bd_stats, (cpu))- 28 (per_cpu_ptr((part)->bd_stats, (cpu))->field)
30 29
31 #define part_stat_get(part, field) 30 #define part_stat_get(part, field) \
32 part_stat_get_cpu(part, field, smp_pro 31 part_stat_get_cpu(part, field, smp_processor_id())
33 32
34 #define part_stat_read(part, field) 33 #define part_stat_read(part, field) \
35 ({ 34 ({ \
36 typeof((part)->bd_stats->field) res = 35 typeof((part)->bd_stats->field) res = 0; \
37 unsigned int _cpu; 36 unsigned int _cpu; \
38 for_each_possible_cpu(_cpu) 37 for_each_possible_cpu(_cpu) \
39 res += per_cpu_ptr((part)->bd_ 38 res += per_cpu_ptr((part)->bd_stats, _cpu)->field; \
40 res; 39 res; \
41 }) 40 })
42 41
43 static inline void part_stat_set_all(struct bl 42 static inline void part_stat_set_all(struct block_device *part, int value)
44 { 43 {
45 int i; 44 int i;
46 45
47 for_each_possible_cpu(i) 46 for_each_possible_cpu(i)
48 memset(per_cpu_ptr(part->bd_st 47 memset(per_cpu_ptr(part->bd_stats, i), value,
49 sizeof(struct 48 sizeof(struct disk_stats));
50 } 49 }
51 50
52 #define part_stat_read_accum(part, field) 51 #define part_stat_read_accum(part, field) \
53 (part_stat_read(part, field[STAT_READ] 52 (part_stat_read(part, field[STAT_READ]) + \
54 part_stat_read(part, field[STAT_WRITE 53 part_stat_read(part, field[STAT_WRITE]) + \
55 part_stat_read(part, field[STAT_DISCA 54 part_stat_read(part, field[STAT_DISCARD]))
56 55
57 #define __part_stat_add(part, field, addnd) 56 #define __part_stat_add(part, field, addnd) \
58 __this_cpu_add((part)->bd_stats->field 57 __this_cpu_add((part)->bd_stats->field, addnd)
59 58
60 #define part_stat_add(part, field, addnd) 59 #define part_stat_add(part, field, addnd) do { \
61 __part_stat_add((part), field, addnd); 60 __part_stat_add((part), field, addnd); \
62 if (bdev_is_partition(part)) !! 61 if ((part)->bd_partno) \
63 __part_stat_add(bdev_whole(par 62 __part_stat_add(bdev_whole(part), field, addnd); \
64 } while (0) 63 } while (0)
65 64
66 #define part_stat_dec(part, field) 65 #define part_stat_dec(part, field) \
67 part_stat_add(part, field, -1) 66 part_stat_add(part, field, -1)
68 #define part_stat_inc(part, field) 67 #define part_stat_inc(part, field) \
69 part_stat_add(part, field, 1) 68 part_stat_add(part, field, 1)
70 #define part_stat_sub(part, field, subnd) 69 #define part_stat_sub(part, field, subnd) \
71 part_stat_add(part, field, -subnd) 70 part_stat_add(part, field, -subnd)
72 71
73 #define part_stat_local_dec(part, field) 72 #define part_stat_local_dec(part, field) \
74 local_dec(&(part_stat_get(part, field) 73 local_dec(&(part_stat_get(part, field)))
75 #define part_stat_local_inc(part, field) 74 #define part_stat_local_inc(part, field) \
76 local_inc(&(part_stat_get(part, field) 75 local_inc(&(part_stat_get(part, field)))
77 #define part_stat_local_read(part, field) 76 #define part_stat_local_read(part, field) \
78 local_read(&(part_stat_get(part, field 77 local_read(&(part_stat_get(part, field)))
79 #define part_stat_local_read_cpu(part, field, 78 #define part_stat_local_read_cpu(part, field, cpu) \
80 local_read(&(part_stat_get_cpu(part, f 79 local_read(&(part_stat_get_cpu(part, field, cpu)))
81 80
82 #endif /* _LINUX_PART_STAT_H */ 81 #endif /* _LINUX_PART_STAT_H */
83 82
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