Commit-ID: a98d24b71b6e229965f18dc00d28dc71cb8fe324
Gitweb: http://git.kernel.org/tip/a98d24b71b6e229965f18dc00d28dc71cb8fe324
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Thu, 30 Sep 2010 10:45:07 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 12 Oct 2010 16:39:07 +0200
genirq: Implement sane enumeration
Use the allocator bitmap to lookup active interrupts.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Ingo Molnar <mingo@xxxxxxx>
---
include/linux/irqnr.h | 5 +++++
kernel/irq/irqdesc.c | 11 +++++++++++
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/include/linux/irqnr.h b/include/linux/irqnr.h
index 7bf89bc..05aa8c23 100644
--- a/include/linux/irqnr.h
+++ b/include/linux/irqnr.h
@@ -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) \
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 6312a2c..2e7e94e 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)
{
--
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