genirq: Remove early_init_irq_lock_class()

early_init_irq_lock_class() is called way before anything touches the
irq descriptors. In case of SPARSE_IRQ=y this is a NOP operation
because the radix tree is empty at this point. For the SPARSE_IRQ=n
case it's sufficient to set the lock class in early_init_irq(). 

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

1 files changed, 1 insertions, 10 deletions

diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index fbf8cfa00510..0a7a0908afbc 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -231,6 +231,7 @@ int __init early_irq_init(void)
                 alloc_desc_masks(&desc[i], 0, true);
                 init_desc_masks(&desc[i]);
                 desc[i].kstat_irqs = kstat_irqs_all[i];
+                lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
         }
         return arch_early_irq_init();
 }
@@ -251,16 +252,6 @@ void clear_kstat_irqs(struct irq_desc *desc)
         memset(desc->kstat_irqs, 0, nr_cpu_ids * sizeof(*(desc->kstat_irqs)));
 }
 
-void early_init_irq_lock_class(void)
-{
-        struct irq_desc *desc;
-        int i;
-
-        for_each_irq_desc(i, desc) {
-                lockdep_set_class(&desc->lock, &irq_desc_lock_class);
-        }
-}
-
 unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
 {
         struct irq_desc *desc = irq_to_desc(irq);