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authorThomas Gleixner <tglx@linutronix.de>2010-09-30 10:45:07 +0200
committerThomas Gleixner <tglx@linutronix.de>2010-10-12 16:39:07 +0200
commita98d24b71b6e229965f18dc00d28dc71cb8fe324 (patch)
tree213a6daf67e459b2078e630d5a8163c3b8fd3a9c /kernel/irq/irqdesc.c
parent13bfe99e09123ef5edb6acb81ba337d2db600b53 (diff)
genirq: Implement sane enumeration
Use the allocator bitmap to lookup active interrupts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/irq/irqdesc.c')
-rw-r--r--kernel/irq/irqdesc.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 6312a2c83971..2e7e94ef64da 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -463,6 +463,17 @@ err:
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)
{