sparseirq: set lock_class for legacy irq when sparse_irq is selected

Impact: fix

that is used to call init_one_irq_desc, after we use static one directly, that line need to be duplicated too.

---
 kernel/irq/handle.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6/kernel/irq/handle.c
===================================================================
@@ -146,6 +146,7 @@ void __init early_irq_init(void)
 	for (i = 0; i < legacy_count; i++) {
 		desc[i].irq = i;
 		desc[i].kstat_irqs = kstat_irqs_legacy[i];
+		lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
 
 		irq_desc_ptrs[i] = desc + i;
 	}

applied to tip/irq/sparseirq, thanks Yinghai. I updated the changelog to the one below.

Ingo

----------------->

From: Yinghai Lu <[email protected]>
Date: Mon, 22 Dec 2008 20:24:09 -0800
Subject: [PATCH] sparseirq: set lock_class for legacy irq when sparse_irq is selected

Impact: add lockdep annotation to legacy IRQ descs

Warnings resulting out of this were not seen in practice, but it's prudent to initialize the legacy descriptors to the lock class as well, symmetric to how we do it with other descriptors.

---
 kernel/irq/handle.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

index 1a01f91..157c04c 100644
@@ -145,6 +145,7 @@ int __init early_irq_init(void)
 	for (i = 0; i < legacy_count; i++) {
 		desc[i].irq = i;
 		desc[i].kstat_irqs = kstat_irqs_legacy[i];
+		lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
 
 		irq_desc_ptrs[i] = desc + i;
 	}