sh: Tie sparseirq in to Kconfig.

Now that the dependent patches are merged, we are ready to enable
sparseirq support. This simply adds the Kconfig option, and then converts
from the _cpu to the _node allocation routines to follow the upstream
sparseirq API changes.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 14 insertions, 5 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index b5629cdc37a0..586cd045e2db 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -678,6 +678,18 @@ config GUSA_RB
           LLSC, this should be more efficient than the other alternative of
           disabling interrupts around the atomic sequence.
 
+config SPARSE_IRQ
+        bool "Support sparse irq numbering"
+        depends on EXPERIMENTAL
+        help
+          This enables support for sparse irqs. This is useful in general
+          as most CPUs have a fairly sparse array of IRQ vectors, which
+          the irq_desc then maps directly on to. Systems with a high
+          number of off-chip IRQs will want to treat this as
+          experimental until they have been independently verified.
+
+          If you don't know what to do here, say N.
+
 endmenu
 
 menu "Boot options"
diff --git a/arch/sh/kernel/cpu/irq/ipr.c b/arch/sh/kernel/cpu/irq/ipr.c
index 6ad40dbad881..808d99a48efb 100644
--- a/arch/sh/kernel/cpu/irq/ipr.c
+++ b/arch/sh/kernel/cpu/irq/ipr.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/io.h>
 #include <linux/interrupt.h>
+#include <linux/topology.h>
 
 static inline struct ipr_desc *get_ipr_desc(unsigned int irq)
 {
@@ -59,21 +60,17 @@ void register_ipr_controller(struct ipr_desc *desc)
 
         for (i = 0; i < desc->nr_irqs; i++) {
                 struct ipr_data *p = desc->ipr_data + i;
-#ifdef CONFIG_SPARSE_IRQ
                 struct irq_desc *irq_desc;
-#endif
 
                 BUG_ON(p->ipr_idx >= desc->nr_offsets);
                 BUG_ON(!desc->ipr_offsets[p->ipr_idx]);
 
-#ifdef CONFIG_SPARSE_IRQ
-                irq_desc = irq_to_desc_alloc_cpu(p->irq, smp_processor_id());
+                irq_desc = irq_to_desc_alloc_node(p->irq, numa_node_id());
                 if (unlikely(!irq_desc)) {
                         printk(KERN_INFO "can not get irq_desc for %d\n",
                                p->irq);
                         continue;
                 }
-#endif
 
                 disable_irq_nosync(p->irq);
                 set_irq_chip_and_handler_name(p->irq, &desc->chip,