[patch, -rc5-mm3] lock validator: early_init_irq_lock_type() build fix

[Ingo Molnar <mingo@elte.hu>]

* Valdis.Kletnieks@vt.edu <Valdis.Kletnieks@vt.edu> wrote:

> Just for grins, I tried building this, and got this error:

the patch below should fix this.

	Ingo

----
Subject: lock validator: early_init_irq_lock_type() build fix
From: Ingo Molnar <mingo@elte.hu>

fix build bug reported by Valdis Kletnieks: if the lock validator
is disabled in the .config then kernel/irq/handle.c would not build.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
---
 kernel/irq/handle.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux/kernel/irq/handle.c
===================================================================
--- linux.orig/kernel/irq/handle.c
+++ linux/kernel/irq/handle.c
@@ -238,6 +238,8 @@ out:
 	return 1;
 }
 
+#ifdef CONFIG_TRACE_IRQFLAGS
+
 /*
  * lockdep: we want to handle all irq_desc locks as a single lock-type:
  */
@@ -250,3 +252,5 @@ void early_init_irq_lock_type(void)
 	for (i = 0; i < NR_IRQS; i++)
 		spin_lock_init_key(&irq_desc[i].lock, &irq_desc_lock_type);
 }
+
+#endif