projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 5e605b64 JA |
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 | ||
| d62f843b JA |
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 | */ | |
| 5e605b64 JA |
26 | static inline int blk_iopoll_sched_prep(struct blk_iopoll *iop) |
| 27 | { | |
| d62f843b JA |
28 | if (!test_bit(IOPOLL_F_DISABLE, &iop->state)) |
| 29 | return test_and_set_bit(IOPOLL_F_SCHED, &iop->state); | |
| 30 | ||
| 31 | return 1; | |
| 5e605b64 JA |
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 |