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authorYinghai Lu <yinghai@kernel.org>2009-04-30 01:17:50 -0700
committerIngo Molnar <mingo@elte.hu>2009-05-01 19:01:12 +0200
commit15e957d08dd4a841359cfec59ecb74041e0097aa (patch)
treee18a8b70751c552ba2bd7248660f137a735938ea /include
parent56b581ea9591b5767b1e0204c6a06c7d0c49396e (diff)
x86/irq: use move_irq_desc() in create_irq_nr()
move_irq_desc() will try to move irq_desc to the home node if the allocated one is not correct, in create_irq_nr(). ( This can happen on devices that are on different nodes that are using MSI, when drivers are loaded and unloaded randomly. ) v2: fix non-smp build v3: add NUMA_IRQ_DESC to eliminate #ifdefs [ Impact: improve irq descriptor locality on NUMA systems ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Rusty Russell <rusty@rustcorp.com.au> LKML-Reference: <49F95EAE.2050903@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/irq.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 4b95ddb5304..eedbb8e5e0c 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -206,9 +206,16 @@ extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc
#ifndef CONFIG_SPARSE_IRQ
extern struct irq_desc irq_desc[NR_IRQS];
-#else /* CONFIG_SPARSE_IRQ */
+#endif
+
+#ifdef CONFIG_NUMA_IRQ_DESC
extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int node);
-#endif /* CONFIG_SPARSE_IRQ */
+#else
+static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
+{
+ return desc;
+}
+#endif
extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);