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, 2 deletions

diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 8d0697f892a2..3fcef37154a1 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -309,7 +309,12 @@ static unsigned int noop_ret(struct irq_data *data)
         return 0;
 }
 
+#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
 static void compat_noop(unsigned int irq) { }
+#define END_INIT .end = compat_noop
+#else
+#define END_INIT
+#endif
 
 /*
  * Generic no controller implementation
@@ -321,7 +326,7 @@ struct irq_chip no_irq_chip = {
         .irq_enable     = noop,
         .irq_disable    = noop,
         .irq_ack        = ack_bad,
-        .end            = compat_noop,
+        END_INIT
 };
 
 /*
@@ -337,7 +342,7 @@ struct irq_chip dummy_irq_chip = {
         .irq_ack        = noop,
         .irq_mask       = noop,
         .irq_unmask     = noop,
-        .end            = compat_noop,
+        END_INIT
 };
 
 /*