regulator: Add support for RICOH PMIC RC5T583 regulator
[linux-2.6.git] / include / linux / blk-iopoll.h
1 #ifndef BLK_IOPOLL_H
2 #define BLK_IOPOLL_H
3
4 struct blk_iopoll;
5 typedef int (blk_iopoll_fn)(struct blk_iopoll *, int);
6
7 struct blk_iopoll {
8         struct list_head list;
9         unsigned long state;
10         unsigned long data;
11         int weight;
12         int max;
13         blk_iopoll_fn *poll;
14 };
15
16 enum {
17         IOPOLL_F_SCHED          = 0,
18         IOPOLL_F_DISABLE        = 1,
19 };
20
21 /*
22  * Returns 0 if we successfully set the IOPOLL_F_SCHED bit, indicating
23  * that we were the first to acquire this iop for scheduling. If this iop
24  * is currently disabled, return "failure".
25  */
26 static inline int blk_iopoll_sched_prep(struct blk_iopoll *iop)
27 {
28         if (!test_bit(IOPOLL_F_DISABLE, &iop->state))
29                 return test_and_set_bit(IOPOLL_F_SCHED, &iop->state);
30
31         return 1;
32 }
33
34 static inline int blk_iopoll_disable_pending(struct blk_iopoll *iop)
35 {
36         return test_bit(IOPOLL_F_DISABLE, &iop->state);
37 }
38
39 extern void blk_iopoll_sched(struct blk_iopoll *);
40 extern void blk_iopoll_init(struct blk_iopoll *, int, blk_iopoll_fn *);
41 extern void blk_iopoll_complete(struct blk_iopoll *);
42 extern void __blk_iopoll_complete(struct blk_iopoll *);
43 extern void blk_iopoll_enable(struct blk_iopoll *);
44 extern void blk_iopoll_disable(struct blk_iopoll *);
45
46 extern int blk_iopoll_enabled;
47
48 #endif