Commit a98d24b7 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq: Implement sane enumeration 



Use the allocator bitmap to lookup active interrupts.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarIngo Molnar <mingo@elte.hu>
parent 13bfe99e

include/linux/irqnr.h

+5 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 


extern int nr_irqs;

extern struct irq_desc *irq_to_desc(unsigned int irq);

unsigned int irq_get_next_irq(unsigned int offset);



# define for_each_irq_desc(irq, desc)					\

	for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs;		\
@@ -47,6 +48,10 @@ extern struct irq_desc *irq_to_desc(unsigned int irq); 
#define irq_node(irq)	0

#endif



# define for_each_active_irq(irq)			\

	for (irq = irq_get_next_irq(0); irq < nr_irqs;	\

	     irq = irq_get_next_irq(irq + 1))



#endif /* CONFIG_GENERIC_HARDIRQS */



#define for_each_irq_nr(irq)                   \

kernel/irq/irqdesc.c

+11 −0
Original line number Diff line number Diff line
@@ -463,6 +463,17 @@ irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node) 
	return ret;

}



/**

 * irq_get_next_irq - get next allocated irq number

 * @offset:	where to start the search

 *

 * Returns next irq number after offset or nr_irqs if none is found.

 */

unsigned int irq_get_next_irq(unsigned int offset)

{

	return find_next_bit(allocated_irqs, nr_irqs, offset);

}



/* Statistics access */

void clear_kstat_irqs(struct irq_desc *desc)

{