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genirq: Prepare proc for real sparse irq support

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/proc/irq never removes any entries, but when irq descriptors can be
freed for real this is necessary. Otherwise we'd reference a freed
descriptor in /proc/irq/N

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2010-09-30 02:46:07 +02:00
parent 1f5a5b87f7
commit 13bfe99e09
3 changed files with 22 additions and 0 deletions
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2
kernel/irq/irqdesc.c
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@ -205,6 +205,8 @@ static void free_desc(unsigned int irq)
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
unregister_irq_proc(irq, desc);
raw_spin_lock_irqsave(&sparse_irq_lock, flags);
delete_irq_desc(irq);
raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);