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authorIvan Kokshaysky <ink@jurassic.park.msu.ru>2006-01-06 03:12:21 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 11:33:40 -0500
commiteee45269b0f5979c70bc151c6c2f4e5f4f5ababe (patch)
treea8ed14ee532ea8dabc1010d540542eea1d620540 /include/linux
parent1fa744e6e91a895750b9980d13fcfc5791a0cd91 (diff)
[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/linux')
-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 f04ba20712a2..60f8bc78a35a 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,
221extern int can_request_irq(unsigned int irq, unsigned long irqflags); 221extern int can_request_irq(unsigned int irq, unsigned long irqflags);
222 222
223extern void init_irq_proc(void); 223extern void init_irq_proc(void);
224
225#ifdef CONFIG_AUTO_IRQ_AFFINITY
226extern int select_smp_affinity(unsigned int irq);
227#else
228static inline int
229select_smp_affinity(unsigned int irq)
230{
231 return 1;
232}
233#endif
234
224#endif 235#endif
225 236
226extern hw_irq_controller no_irq_type; /* needed in every arch ? */ 237extern hw_irq_controller no_irq_type; /* needed in every arch ? */