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authorYinghai Lu <yhlu.kernel@gmail.com>2008-08-19 20:50:11 -0700
committerIngo Molnar <mingo@elte.hu>2008-10-16 16:52:33 +0200
commit2c6927a38f65b53b62f86158fba29a068c4e8b6a (patch)
tree4f23cf5689c8fbaed771219b4afd3f785d8048bc /include
parent9059d8fa4a3a9153da53da890039f7f956cc9d19 (diff)
irq: replace loop with nr_irqs with for_each_irq_desc
There are a handful of loops that go from 0 to nr_irqs and use get_irq_desc() on them. These would allocate all the irq_desc entries, regardless of the need for them. Use the smarter for_each_irq_desc() iterator that will only iterate over the present ones. v2: make sure arch without GENERIC_HARDIRQS work too Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/irq.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index c9ffef7c3b4..9de16ca8b8e 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -202,9 +202,16 @@ extern struct irq_desc irq_desc[NR_IRQS];
extern struct irq_desc *irq_desc;
#endif
+#ifdef CONFIG_GENERIC_HARDIRQS
+#define for_each_irq_desc(irq, desc) \
+ for (irq = 0, desc = irq_desc; irq < nr_irqs; irq++, desc = &irq_desc[irq])
+#endif
+
#else
extern struct irq_desc *sparse_irqs;
+#define for_each_irq_desc(irqX, desc) \
+ for (desc = sparse_irqs, irqX = desc->irq; desc && irqX != -1U; desc = desc->next, irqX = desc ? desc->irq : -1U)
#endif