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    Subject[patch 49/75] 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>
    ---
    include/linux/irq.h | 3 +++
    include/linux/irqdesc.h | 1 +
    2 files changed, 4 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
    @@ -100,6 +100,8 @@ 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
    @@ -114,6 +116,7 @@ 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;
    Index: linux-2.6-tip/include/linux/irqdesc.h
    ===================================================================
    --- linux-2.6-tip.orig/include/linux/irqdesc.h
    +++ linux-2.6-tip/include/linux/irqdesc.h
    @@ -48,6 +48,7 @@ struct irq_desc {
    struct {
    unsigned int irq;
    unsigned int node;
    + unsigned int pad_do_not_even_think_about_it;
    struct irq_chip *chip;
    void *handler_data;
    void *chip_data;



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