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irq_poll: fold irq_poll_sched_prep into irq_poll_sched

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There is no good reason to keep them apart, and this makes using the API
a bit simpler.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
This commit is contained in:
Christoph Hellwig 2015-12-07 06:41:11 -08:00
parent 78d0264eb7
commit ea51190c03
4 changed files with 10 additions and 22 deletions
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6
drivers/scsi/be2iscsi/be_main.c
View File

@ -910,8 +910,7 @@ static irqreturn_t be_isr_msix(int irq, void *dev_id)
num_eq_processed = 0;
while (eqe->dw[offsetof(struct amap_eq_entry, valid) / 32]
& EQE_VALID_MASK) {
if (!irq_poll_sched_prep(&pbe_eq->iopoll))
irq_poll_sched(&pbe_eq->iopoll);
irq_poll_sched(&pbe_eq->iopoll);
AMAP_SET_BITS(struct amap_eq_entry, valid, eqe, 0);
queue_tail_inc(eq);
@ -972,8 +971,7 @@ static irqreturn_t be_isr(int irq, void *dev_id)
spin_unlock_irqrestore(&phba->isr_lock, flags);
num_mcceq_processed++;
} else {
if (!irq_poll_sched_prep(&pbe_eq->iopoll))
irq_poll_sched(&pbe_eq->iopoll);
irq_poll_sched(&pbe_eq->iopoll);
num_ioeq_processed++;
}
AMAP_SET_BITS(struct amap_eq_entry, valid, eqe, 0);

3
drivers/scsi/ipr.c
View File

@ -5692,8 +5692,7 @@ static irqreturn_t ipr_isr_mhrrq(int irq, void *devp)
if (ioa_cfg->iopoll_weight && ioa_cfg->sis64 && ioa_cfg->nvectors > 1) {
if ((be32_to_cpu(*hrrq->hrrq_curr) & IPR_HRRQ_TOGGLE_BIT) ==
hrrq->toggle_bit) {
if (!irq_poll_sched_prep(&hrrq->iopoll))
irq_poll_sched(&hrrq->iopoll);
irq_poll_sched(&hrrq->iopoll);
spin_unlock_irqrestore(hrrq->lock, hrrq_flags);
return IRQ_HANDLED;
}

13
include/linux/irq_poll.h
View File

@ -18,19 +18,6 @@ enum {
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);

10
lib/irq_poll.c
View File

@ -21,13 +21,17 @@ static DEFINE_PER_CPU(struct list_head, blk_cpu_iopoll);
*
* Description:
* Add this irq_poll structure to the pending poll list and trigger the
* raise of the blk iopoll softirq. The driver must already have gotten a
* successful return from irq_poll_sched_prep() before calling this.
* raise of the blk iopoll softirq.
**/
void irq_poll_sched(struct irq_poll *iop)
{
unsigned long flags;
if (test_bit(IRQ_POLL_F_DISABLE, &iop->state))
return;
if (!test_and_set_bit(IRQ_POLL_F_SCHED, &iop->state))
return;
local_irq_save(flags);
list_add_tail(&iop->list, this_cpu_ptr(&blk_cpu_iopoll));
__raise_softirq_irqoff(IRQ_POLL_SOFTIRQ);
@ -58,7 +62,7 @@ EXPORT_SYMBOL(__irq_poll_complete);
* Description:
* If a driver consumes less than the assigned budget in its run of the
* iopoll handler, it'll end the polled mode by calling this function. The
* iopoll handler will not be invoked again before irq_poll_sched_prep()
* iopoll handler will not be invoked again before irq_poll_sched()
* is called.
**/
void irq_poll_complete(struct irq_poll *iop)