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genirq: Provide and use __irq_can_set_affinity()

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Provide a irq_desc based variant of irq_can_set_affinity() to avoid a
redundant lookup for the core code users.

[ tglx: Split out from combo patch ]

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiang Liu 2015-06-23 20:29:34 +02:00 committed by Thomas Gleixner
parent 0dcdbc9755
commit e019c249a6
1 changed files with 10 additions and 8 deletions
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18
kernel/irq/manage.c
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@ -115,6 +115,14 @@ EXPORT_SYMBOL(synchronize_irq);
#ifdef CONFIG_SMP
cpumask_var_t irq_default_affinity;
static int __irq_can_set_affinity(struct irq_desc *desc)
{
if (!desc || !irqd_can_balance(&desc->irq_data) ||
!desc->irq_data.chip || !desc->irq_data.chip->irq_set_affinity)
return 0;
return 1;
}
/**
* irq_can_set_affinity - Check if the affinity of a given irq can be set
* @irq: Interrupt to check
@ -122,13 +130,7 @@ cpumask_var_t irq_default_affinity;
*/
int irq_can_set_affinity(unsigned int irq)
{
struct irq_desc *desc = irq_to_desc(irq);
if (!desc || !irqd_can_balance(&desc->irq_data) ||
!desc->irq_data.chip || !desc->irq_data.chip->irq_set_affinity)
return 0;
return 1;
return __irq_can_set_affinity(irq_to_desc(irq));
}
/**
@ -366,7 +368,7 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
int node = irq_desc_get_node(desc);
/* Excludes PER_CPU and NO_BALANCE interrupts */
if (!irq_can_set_affinity(irq))
if (!__irq_can_set_affinity(desc))
return 0;
/*