struct irq_data — per irq and irq chip data passed down to chip functions
struct irq_data { unsigned int irq; unsigned int node; struct irq_chip * chip; void * handler_data; void * chip_data; struct msi_desc * msi_desc; #ifdef CONFIG_SMP cpumask_var_t affinity; #endif };
interrupt number
node index useful for balancing
low level interrupt hardware access
per-IRQ data for the irq_chip methods
platform-specific per-chip private data for the chip methods, to allow shared chip implementations
MSI descriptor
IRQ affinity on SMP