Commit 8fee5c36 authored by Ingo Molnar's avatar Ingo Molnar Committed by Linus Torvalds
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[PATCH] genirq: doc: comment include/linux/irq.h structures

Better document the hw_interrupt_type and irq_desc structures.
Signed-off-by: default avatarIngo Molnar <>
Signed-off-by: default avatarThomas Gleixner <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent c0ad90a3
......@@ -40,9 +40,27 @@
# define CHECK_IRQ_PER_CPU(var) 0
* Interrupt controller descriptor. This is all we need
* to describe about the low-level hardware.
* struct hw_interrupt_type - hardware interrupt type descriptor
* @name: name for /proc/interrupts
* @startup: start up the interrupt (defaults to ->enable if NULL)
* @shutdown: shut down the interrupt (defaults to ->disable if NULL)
* @enable: enable the interrupt (defaults to chip->unmask if NULL)
* @disable: disable the interrupt (defaults to chip->mask if NULL)
* @handle_irq: irq flow handler called from the arch IRQ glue code
* @ack: start of a new interrupt
* @mask: mask an interrupt source
* @mask_ack: ack and mask an interrupt source
* @unmask: unmask an interrupt source
* @hold: same interrupt while the handler is running
* @end: end of interrupt
* @set_affinity: set the CPU affinity on SMP machines
* @retrigger: resend an IRQ to the CPU
* @set_type: set the flow type (IRQ_TYPE_LEVEL/etc.) of an IRQ
* @set_wake: enable/disable power-management wake-on of an IRQ
* @release: release function solely used by UML
struct hw_interrupt_type {
const char *typename;
......@@ -65,10 +83,22 @@ typedef struct hw_interrupt_type hw_irq_controller;
struct proc_dir_entry;
* This is the "IRQ descriptor", which contains various information
* about the irq, including what kind of hardware handling it has,
* whether it is disabled etc etc.
* struct irq_desc - interrupt descriptor
* @handler: interrupt type dependent handler functions
* @handler_data: data for the type handlers
* @action: the irq action chain
* @status: status information
* @depth: disable-depth, for nested irq_disable() calls
* @irq_count: stats field to detect stalled irqs
* @irqs_unhandled: stats field for spurious unhandled interrupts
* @lock: locking for SMP
* @affinity: IRQ affinity on SMP
* @pending_mask: pending rebalanced interrupts
* @move_irq: need to re-target IRQ destination
* @dir: /proc/irq/ procfs entry
* @affinity_entry: /proc/irq/smp_affinity procfs entry on SMP
* Pad this out to 32 bytes for cache and indexing reasons.
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