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42 lines
982 B
C
42 lines
982 B
C
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#ifndef BLK_IOPOLL_H
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#define BLK_IOPOLL_H
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struct blk_iopoll;
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typedef int (blk_iopoll_fn)(struct blk_iopoll *, int);
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struct blk_iopoll {
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struct list_head list;
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unsigned long state;
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unsigned long data;
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int weight;
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int max;
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blk_iopoll_fn *poll;
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};
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enum {
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IOPOLL_F_SCHED = 0,
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IOPOLL_F_DISABLE = 1,
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};
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static inline int blk_iopoll_sched_prep(struct blk_iopoll *iop)
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{
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return !test_bit(IOPOLL_F_DISABLE, &iop->state) &&
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!test_and_set_bit(IOPOLL_F_SCHED, &iop->state);
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}
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static inline int blk_iopoll_disable_pending(struct blk_iopoll *iop)
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{
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return test_bit(IOPOLL_F_DISABLE, &iop->state);
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}
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extern void blk_iopoll_sched(struct blk_iopoll *);
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extern void blk_iopoll_init(struct blk_iopoll *, int, blk_iopoll_fn *);
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extern void blk_iopoll_complete(struct blk_iopoll *);
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extern void __blk_iopoll_complete(struct blk_iopoll *);
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extern void blk_iopoll_enable(struct blk_iopoll *);
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extern void blk_iopoll_disable(struct blk_iopoll *);
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extern int blk_iopoll_enabled;
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#endif
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