blob: d8a86b45dd6685ef9618cf9cd3aa90dc24d769ea (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
#ifndef _LINUX_BACKING_DEV_H
#define _LINUX_BACKING_DEV_H
#include <linux/list.h>
typedef int (congested_fn)(void *, int);
enum wb_congested_state {
WB_async_congested, /* The async (write) queue is getting full */
WB_sync_congested, /* The sync queue is getting full */
};
struct backing_dev_info {
struct list_head bdi_list;
unsigned ra_pages;
unsigned capabilities;
congested_fn *congested_fn;
void *congested_data;
};
#define BDI_CAP_NO_ACCT_DIRTY 0x00000001
#define BDI_CAP_NO_WRITEBACK 0x00000002
#define BDI_CAP_NO_ACCT_WB 0x00000004
#define BDI_CAP_STABLE_WRITES 0x00000008
#define BDI_CAP_STRICTLIMIT 0x00000010
#define BDI_CAP_CGROUP_WRITEBACK 0x00000020
static inline int bdi_congested(struct backing_dev_info *bdi, int cong_bits)
{
return 0;
}
static inline int __must_check bdi_setup_and_register(struct backing_dev_info *bdi,
char *name)
{
bdi->capabilities = 0;
return 0;
}
static inline void bdi_destroy(struct backing_dev_info *bdi) {}
#define VM_MAX_READAHEAD 128 /* kbytes */
#endif /* _LINUX_BACKING_DEV_H */
|
