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irq_poll: make blk-iopoll available outside the block layer

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The new name is irq_poll as iopoll is already taken.  Better suggestions
welcome.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
This commit is contained in:
Christoph Hellwig
2015-11-10 14:56:14 +01:00
parent a2dbb7b56f
commit 511cbce2ff
18 changed files with 143 additions and 138 deletions
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46
include/linux/irq_poll.h Normal file
View File

@@ -0,0 +1,46 @@
#ifndef IRQ_POLL_H
#define IRQ_POLL_H
struct irq_poll;
typedef int (irq_poll_fn)(struct irq_poll *, int);
struct irq_poll {
struct list_head list;
unsigned long state;
unsigned long data;
int weight;
int max;
irq_poll_fn *poll;
};
enum {
IRQ_POLL_F_SCHED = 0,
IRQ_POLL_F_DISABLE = 1,
};
/*
* Returns 0 if we successfully set the IRQ_POLL_F_SCHED bit, indicating
* that we were the first to acquire this iop for scheduling. If this iop
* is currently disabled, return "failure".
*/
static inline int irq_poll_sched_prep(struct irq_poll *iop)
{
if (!test_bit(IRQ_POLL_F_DISABLE, &iop->state))
return test_and_set_bit(IRQ_POLL_F_SCHED, &iop->state);
return 1;
}
static inline int irq_poll_disable_pending(struct irq_poll *iop)
{
return test_bit(IRQ_POLL_F_DISABLE, &iop->state);
}
extern void irq_poll_sched(struct irq_poll *);
extern void irq_poll_init(struct irq_poll *, int, irq_poll_fn *);
extern void irq_poll_complete(struct irq_poll *);
extern void __irq_poll_complete(struct irq_poll *);
extern void irq_poll_enable(struct irq_poll *);
extern void irq_poll_disable(struct irq_poll *);
#endif