SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 static inline int blk_iopoll_sched_prep(struct blk_iopoll *iop)
  22 {
  23         return !test_bit(IOPOLL_F_DISABLE, &iop->state) &&
  24                 !test_and_set_bit(IOPOLL_F_SCHED, &iop->state);
  25 }
  26
  27 static inline int blk_iopoll_disable_pending(struct blk_iopoll *iop)
  28 {
  29         return test_bit(IOPOLL_F_DISABLE, &iop->state);
  30 }
  31
  32 extern void blk_iopoll_sched(struct blk_iopoll *);
  33 extern void blk_iopoll_init(struct blk_iopoll *, int, blk_iopoll_fn *);
  34 extern void blk_iopoll_complete(struct blk_iopoll *);
  35 extern void __blk_iopoll_complete(struct blk_iopoll *);
  36 extern void blk_iopoll_enable(struct blk_iopoll *);
  37 extern void blk_iopoll_disable(struct blk_iopoll *);
  38
  39 extern int blk_iopoll_enabled;
  40
  41 #endif