Commit e019c249 authored by Jiang Liu's avatar Jiang Liu Committed by Thomas Gleixner
Browse files

genirq: Provide and use __irq_can_set_affinity() 



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: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 0dcdbc97

kernel/irq/manage.c

+10 −8
Original line number Diff line number Diff line
@@ -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;



	/*

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