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authorIvan Kokshaysky <ink@jurassic.park.msu.ru>2006-01-06 00:12:21 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:40 -0800
commiteee45269b0f5979c70bc151c6c2f4e5f4f5ababe (patch)
treea8ed14ee532ea8dabc1010d540542eea1d620540 /include
parent1fa744e6e91a895750b9980d13fcfc5791a0cd91 (diff)
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[PATCH] Alpha: convert to generic irq framework (generic part)
Thanks to Christoph for doing most of the work. This allows automatic SMP IRQ affinity assignment other than default "all interrupts on all CPUs" which is rather expensive. This might be useful if the hardware can be programmed to distribute interrupts among different CPUs, like Alpha does. Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Christoph Hellwig <hch@lst.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/irq.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index f04ba20..60f8bc7 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -221,6 +221,17 @@ extern void note_interrupt(unsigned int irq, irq_desc_t *desc,
extern int can_request_irq(unsigned int irq, unsigned long irqflags);
extern void init_irq_proc(void);
+
+#ifdef CONFIG_AUTO_IRQ_AFFINITY
+extern int select_smp_affinity(unsigned int irq);
+#else
+static inline int
+select_smp_affinity(unsigned int irq)
+{
+ return 1;
+}
+#endif
+
#endif
extern hw_irq_controller no_irq_type; /* needed in every arch ? */
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