diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-03-22 17:08:15 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-03-23 20:22:06 +0100 |
| commit | d3e17deb1790ee2123e9d11420be6411d1768b47 (patch) | |
| tree | ecbfd39ef20da51fc7d5bd8a8b590f45823818f1 | |
| parent | 3b9038912828384e38d82409c281124631c8533b (diff) | |
genirq: Provide a lockdep helper
Some irq chips need to call genirq functions for nested chips from
their callbacks. That upsets lockdep. So they need to set a different
lock class for those nested chips. Provide a helper function to avoid
open access to irq_desc.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | include/linux/irqdesc.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h index 0b30662bc36..1595f9176b4 100644 --- a/include/linux/irqdesc.h +++ b/include/linux/irqdesc.h @@ -191,6 +191,15 @@ static inline void __set_irq_handler_unlocked(int irq, desc->handle_irq = handler; } +static inline void +irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class) +{ + struct irq_desc *desc = irq_to_desc(irq); + + if (desc) + lockdep_set_class(&desc->lock, class); +} + #ifdef CONFIG_IRQ_PREFLOW_FASTEOI static inline void __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) |