genirq: Add state field to irq_data

Some chip implementations need to access certain status flags. With
sparse irqs that requires a lookup of the irq descriptor. Add a state
field which contains such flags.

Name it in a way which will make coders happy to access it with the
proper accessor functions. And it's easy to grep for.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 3ce45c257edb..62bb08e4af13 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -102,6 +102,8 @@ struct msi_desc;
  * struct irq_data - per irq and irq chip data passed down to chip functions
  * @irq:                interrupt number
  * @node:               node index useful for balancing
+ * @state_use_accessor: status information for irq chip functions.
+ *                      Use accessor functions to deal with it
  * @chip:               low level interrupt hardware access
  * @handler_data:       per-IRQ data for the irq_chip methods
  * @chip_data:          platform-specific per-chip private data for the chip
@@ -116,6 +118,7 @@ struct msi_desc;
 struct irq_data {
         unsigned int            irq;
         unsigned int            node;
+        unsigned int            state_use_accessors;
         struct irq_chip         *chip;
         void                    *handler_data;
         void                    *chip_data;