powerpc: Make "intspec" pointers in irq_host->xlate() const

Writing a driver using SCLPC on the MPC5200B I detected, that the
intspec arrays to map irqs to Linux virq cannot be const, because the
mapping and xlate functions only take non const pointers. All those
functions do not modify the intspec, so a const pointer could be used.

Signed-off-by: Roman Fietze <roman.fietze@telemotive.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
index c85a32f1a17f..e054baef1845 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -100,7 +100,7 @@ struct irq_host_ops {
          * interrupt controller has for that line)
          */
         int (*xlate)(struct irq_host *h, struct device_node *ctrler,
-                     u32 *intspec, unsigned int intsize,
+                     const u32 *intspec, unsigned int intsize,
                      irq_hw_number_t *out_hwirq, unsigned int *out_type);
 };
 
@@ -314,7 +314,7 @@ extern void irq_free_virt(unsigned int virq, unsigned int count);
  * of the of_irq_map_*() functions.
  */
 extern unsigned int irq_create_of_mapping(struct device_node *controller,
-                                          u32 *intspec, unsigned int intsize);
+                                          const u32 *intspec, unsigned int intsize);
 
 /**
  * irq_of_parse_and_map - Parse and Map an interrupt into linux virq space