This source file includes following definitions.
- fprop_inc_single
- fprop_inc_percpu
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8 #ifndef _LINUX_FLEX_PROPORTIONS_H
9 #define _LINUX_FLEX_PROPORTIONS_H
10
11 #include <linux/percpu_counter.h>
12 #include <linux/spinlock.h>
13 #include <linux/seqlock.h>
14 #include <linux/gfp.h>
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21
22 #define FPROP_FRAC_SHIFT 10
23 #define FPROP_FRAC_BASE (1UL << FPROP_FRAC_SHIFT)
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27
28 struct fprop_global {
29
30 struct percpu_counter events;
31
32 unsigned int period;
33
34 seqcount_t sequence;
35 };
36
37 int fprop_global_init(struct fprop_global *p, gfp_t gfp);
38 void fprop_global_destroy(struct fprop_global *p);
39 bool fprop_new_period(struct fprop_global *p, int periods);
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43
44 struct fprop_local_single {
45
46 unsigned long events;
47
48 unsigned int period;
49 raw_spinlock_t lock;
50 };
51
52 #define INIT_FPROP_LOCAL_SINGLE(name) \
53 { .lock = __RAW_SPIN_LOCK_UNLOCKED(name.lock), \
54 }
55
56 int fprop_local_init_single(struct fprop_local_single *pl);
57 void fprop_local_destroy_single(struct fprop_local_single *pl);
58 void __fprop_inc_single(struct fprop_global *p, struct fprop_local_single *pl);
59 void fprop_fraction_single(struct fprop_global *p,
60 struct fprop_local_single *pl, unsigned long *numerator,
61 unsigned long *denominator);
62
63 static inline
64 void fprop_inc_single(struct fprop_global *p, struct fprop_local_single *pl)
65 {
66 unsigned long flags;
67
68 local_irq_save(flags);
69 __fprop_inc_single(p, pl);
70 local_irq_restore(flags);
71 }
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76 struct fprop_local_percpu {
77
78 struct percpu_counter events;
79
80 unsigned int period;
81 raw_spinlock_t lock;
82 };
83
84 int fprop_local_init_percpu(struct fprop_local_percpu *pl, gfp_t gfp);
85 void fprop_local_destroy_percpu(struct fprop_local_percpu *pl);
86 void __fprop_inc_percpu(struct fprop_global *p, struct fprop_local_percpu *pl);
87 void __fprop_inc_percpu_max(struct fprop_global *p, struct fprop_local_percpu *pl,
88 int max_frac);
89 void fprop_fraction_percpu(struct fprop_global *p,
90 struct fprop_local_percpu *pl, unsigned long *numerator,
91 unsigned long *denominator);
92
93 static inline
94 void fprop_inc_percpu(struct fprop_global *p, struct fprop_local_percpu *pl)
95 {
96 unsigned long flags;
97
98 local_irq_save(flags);
99 __fprop_inc_percpu(p, pl);
100 local_irq_restore(flags);
101 }
102
103 #endif