Enable percpu vector domain for IA64_GENERIC

Add per-CPU vector domain support for IA64_GENERIC. It is enabled by adding the "vector=percpu" boot option.

---
 arch/ia64/kernel/irq_ia64.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+)

Index: linux-2.6.22-rc5/arch/ia64/kernel/irq_ia64.c
=================================--- linux-2.6.22-rc5.orig/arch/ia64/kernel/irq_ia64.c 2007-06-19 15:33:47.000000000 +0900
+++ linux-2.6.22-rc5/arch/ia64/kernel/irq_ia64.c 2007-06-19 15:33:50.000000000 +0900
@@ -227,10 +227,36 @@ void __setup_vector_irq(int cpu)
}
}

+#if defined(CONFIG_IA64_GENERIC)
+static enum vector_domain_type {
+ VECTOR_DOMAIN_NONE,
+ VECTOR_DOMAIN_PERCPU
+} vector_domain_type = VECTOR_DOMAIN_NONE; +
+static cpumask_t vector_allocation_domain(int cpu) +{
+ if (vector_domain_type = VECTOR_DOMAIN_PERCPU)
+ return cpumask_of_cpu(cpu);
+ return CPU_MASK_ALL;
+}
+
+static int __init parse_vector_domain(char *arg) +{
+ if (!arg)
+ return -EINVAL;
+ if (!strcmp(arg, "percpu")) {
+ vector_domain_type = VECTOR_DOMAIN_PERCPU;
+ no_int_routing = 1;
+ }
+ return 1;
+}
+early_param("vector", parse_vector_domain); +#else
static cpumask_t vector_allocation_domain(int cpu) {
return CPU_MASK_ALL;
}
+#endif

static int __reassign_irq_vector(int irq, int cpu) {