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setup_irq(9) [centos man page]

SETUP_IRQ(9)						     Public Functions Provided						      SETUP_IRQ(9)

setup_irq - setup an interrupt SYNOPSIS
int setup_irq(unsigned int irq, struct irqaction * act); ARGUMENTS
irq Interrupt line to setup act irqaction for the interrupt DESCRIPTION
Used to statically setup interrupts in the early boot process. AUTHORS
Thomas Gleixner <> Author. Ingo Molnar <> Author. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SETUP_IRQ(9)

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struct_irq_desc - interrupt descriptor SYNOPSIS
struct irq_desc { unsigned int irq; struct timer_rand_state * timer_rand_state; unsigned int * kstat_irqs; #ifdef CONFIG_INTR_REMAP struct irq_2_iommu * irq_2_iommu; #endif irq_flow_handler_t handle_irq; struct irq_chip * chip; struct msi_desc * msi_desc; void * handler_data; void * chip_data; struct irqaction * action; unsigned int status; unsigned int depth; unsigned int wake_depth; unsigned int irq_count; unsigned long last_unhandled; unsigned int irqs_unhandled; raw_spinlock_t lock; #ifdef CONFIG_SMP cpumask_var_t affinity; unsigned int node; #ifdef CONFIG_GENERIC_PENDING_IRQ cpumask_var_t pending_mask; #endif #endif atomic_t threads_active; wait_queue_head_t wait_for_threads; #ifdef CONFIG_PROC_FS struct proc_dir_entry * dir; #endif const char * name; }; MEMBERS
irq interrupt number for this descriptor timer_rand_state pointer to timer rand state struct kstat_irqs irq stats per cpu irq_2_iommu iommu with this irq handle_irq highlevel irq-events handler [if NULL, __do_IRQ] chip low level interrupt hardware access msi_desc MSI descriptor handler_data per-IRQ data for the irq_chip methods chip_data platform-specific per-chip private data for the chip methods, to allow shared chip implementations action the irq action chain status status information depth disable-depth, for nested irq_disable calls wake_depth enable depth, for multiple set_irq_wake callers irq_count stats field to detect stalled irqs last_unhandled aging timer for unhandled count irqs_unhandled stats field for spurious unhandled interrupts lock locking for SMP affinity IRQ affinity on SMP node node index useful for balancing pending_mask pending rebalanced interrupts threads_active number of irqaction threads currently running wait_for_threads wait queue for sync_irq to wait for threaded handlers dir /proc/irq/ procfs entry name flow handler name for /proc/interrupts output AUTHORS
Thomas Gleixner <> Author. Ingo Molnar <> Author. COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 STRUCT IRQ_DESC(9)
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