Looking through irq_chip implementations I noticed that some of them have special requirements, like setting the type masked and therefor fiddle in irq_desc->status. Add a flag field, so the core code can handle it. Signed-off-by: Thomas Gleixner --- include/linux/irq.h | 3 +++ 1 file changed, 3 insertions(+) Index: linux-2.6-tip/include/linux/irq.h =================================================================== --- linux-2.6-tip.orig/include/linux/irq.h +++ linux-2.6-tip/include/linux/irq.h @@ -250,6 +250,7 @@ static inline bool irqd_is_level_type(st * @irq_set_wake: enable/disable power-management wake-on of an IRQ * @irq_bus_lock: function to lock access to slow bus (i2c) chips * @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips + * @flags: chip specific flags * * @release: release function solely used by UML */ @@ -296,6 +297,8 @@ struct irq_chip { void (*irq_bus_lock)(struct irq_data *data); void (*irq_bus_sync_unlock)(struct irq_data *data); + unsigned long flags; + /* Currently used only by UML, might disappear one day.*/ #ifdef CONFIG_IRQ_RELEASE_METHOD void (*release)(unsigned int irq, void *dev_id);