genirq: Provide config option to disable deprecated code

This option covers now the old chip functions and the irq_desc data
fields which are moving to struct irq_data. More stuff will follow.

Pretty handy for testing a conversion, whether something broke or not.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 7 insertions, 1 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 0c83cbd2df4e..82ed8231394a 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -155,6 +155,7 @@ struct irq_data {
  */
 struct irq_chip {
         const char      *name;
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
         unsigned int    (*startup)(unsigned int irq);
         void            (*shutdown)(unsigned int irq);
         void            (*enable)(unsigned int irq);
@@ -175,7 +176,7 @@ struct irq_chip {
 
         void            (*bus_lock)(unsigned int irq);
         void            (*bus_sync_unlock)(unsigned int irq);
-
+#endif
         unsigned int    (*irq_startup)(struct irq_data *data);
         void            (*irq_shutdown)(struct irq_data *data);
         void            (*irq_enable)(struct irq_data *data);
@@ -225,6 +226,9 @@ struct irq_2_iommu;
  */
 struct irq_desc {
 
+#ifdef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
+        struct irq_data         irq_data;
+#else
         /*
          * This union will go away, once we fixed the direct access to
          * irq_desc all over the place. The direct fields are a 1:1
@@ -247,6 +251,8 @@ struct irq_desc {
 #endif
                 };
         };
+#endif
+
         struct timer_rand_state *timer_rand_state;
         unsigned int            *kstat_irqs;
         irq_flow_handler_t      handle_irq;