2 files changed, 12 insertions, 2 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c01580d86fdd..3aa79f8e39e4 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -56,6 +56,16 @@ config IRQ_PER_CPU
         bool
         default y
 
+config NR_IRQS
+        int "Number of virtual interrupt numbers"
+        range 32 512
+        default "512"
+        help
+          This defines the number of virtual interrupt numbers the kernel
+          can manage. Virtual interrupt numbers are what you see in
+          /proc/interrupts. If you configure your system to have too few,
+          drivers will fail to load or worse - handle with care.
+
 config STACKTRACE_SUPPORT
         bool
         default y
diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
index bbcd1aaf3dfd..b83fcc81faed 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -34,8 +34,8 @@ extern atomic_t ppc_n_lost_interrupts;
  */
 #define NO_IRQ_IGNORE           ((unsigned int)-1)
 
-/* Total number of virq in the platform (make it a CONFIG_* option ? */
-#define NR_IRQS         512
+/* Total number of virq in the platform */
+#define NR_IRQS         CONFIG_NR_IRQS
 
 /* Number of irqs reserved for the legacy controller */
 #define NUM_ISA_INTERRUPTS      16