power: smb349: add callback to update charger
[linux-2.6.git] / include / linux / task_io_accounting_ops.h
1 /*
2  * Task I/O accounting operations
3  */
4 #ifndef __TASK_IO_ACCOUNTING_OPS_INCLUDED
5 #define __TASK_IO_ACCOUNTING_OPS_INCLUDED
6
7 #include <linux/sched.h>
8
9 #ifdef CONFIG_TASK_IO_ACCOUNTING
10 static inline void task_io_account_read(size_t bytes)
11 {
12         current->ioac.read_bytes += bytes;
13 }
14
15 /*
16  * We approximate number of blocks, because we account bytes only.
17  * A 'block' is 512 bytes
18  */
19 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
20 {
21         return p->ioac.read_bytes >> 9;
22 }
23
24 static inline void task_io_account_write(size_t bytes)
25 {
26         current->ioac.write_bytes += bytes;
27 }
28
29 /*
30  * We approximate number of blocks, because we account bytes only.
31  * A 'block' is 512 bytes
32  */
33 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
34 {
35         return p->ioac.write_bytes >> 9;
36 }
37
38 static inline void task_io_account_cancelled_write(size_t bytes)
39 {
40         current->ioac.cancelled_write_bytes += bytes;
41 }
42
43 static inline void task_io_accounting_init(struct task_io_accounting *ioac)
44 {
45         memset(ioac, 0, sizeof(*ioac));
46 }
47
48 static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
49                                                 struct task_io_accounting *src)
50 {
51         dst->read_bytes += src->read_bytes;
52         dst->write_bytes += src->write_bytes;
53         dst->cancelled_write_bytes += src->cancelled_write_bytes;
54 }
55
56 #else
57
58 static inline void task_io_account_read(size_t bytes)
59 {
60 }
61
62 static inline unsigned long task_io_get_inblock(const struct task_struct *p)
63 {
64         return 0;
65 }
66
67 static inline void task_io_account_write(size_t bytes)
68 {
69 }
70
71 static inline unsigned long task_io_get_oublock(const struct task_struct *p)
72 {
73         return 0;
74 }
75
76 static inline void task_io_account_cancelled_write(size_t bytes)
77 {
78 }
79
80 static inline void task_io_accounting_init(struct task_io_accounting *ioac)
81 {
82 }
83
84 static inline void task_blk_io_accounting_add(struct task_io_accounting *dst,
85                                                 struct task_io_accounting *src)
86 {
87 }
88
89 #endif /* CONFIG_TASK_IO_ACCOUNTING */
90
91 #ifdef CONFIG_TASK_XACCT
92 static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
93                                                 struct task_io_accounting *src)
94 {
95         dst->rchar += src->rchar;
96         dst->wchar += src->wchar;
97         dst->syscr += src->syscr;
98         dst->syscw += src->syscw;
99 }
100 #else
101 static inline void task_chr_io_accounting_add(struct task_io_accounting *dst,
102                                                 struct task_io_accounting *src)
103 {
104 }
105 #endif /* CONFIG_TASK_XACCT */
106
107 static inline void task_io_accounting_add(struct task_io_accounting *dst,
108                                                 struct task_io_accounting *src)
109 {
110         task_chr_io_accounting_add(dst, src);
111         task_blk_io_accounting_add(dst, src);
112 }
113 #endif /* __TASK_IO_ACCOUNTING_OPS_INCLUDED */