[PATCH] genirq: doc: handle_IRQ_event() and __do_IRQ() comments

[linux-2.6] / kernel / irq / handle.c

diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index cc786aaf30d61aa48042328afe08a093959e9006..7fc7bc33d497334205f014b7d8b8abb179c3256e 100644 (file)
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -18,7 +18,7 @@
  * Linux has a controller-independent interrupt architecture.
  * Every controller has a 'controller-template', that is used
  * by the main code to do the right thing. Each driver-visible
- * interrupt source is transparently wired to the apropriate
+ * interrupt source is transparently wired to the appropriate
  * controller. Thus drivers need not be aware of the
  * interrupt-controller.
  *
@@ -28,7 +28,7 @@
  *
  * Controller mappings for all interrupt sources:
  */
-irq_desc_t irq_desc[NR_IRQS] __cacheline_aligned = {
+struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned = {
        [0 ... NR_IRQS-1] = {
                .status = IRQ_DISABLED,
                .chip = &no_irq_type,
@@ -76,11 +76,16 @@ irqreturn_t no_action(int cpl, void *dev_id, struct pt_regs *regs)
        return IRQ_NONE;
 }
 
-/*
- * Have got an event to handle:
+/**
+ * handle_IRQ_event - irq action chain handler
+ * @irq:       the interrupt number
+ * @regs:      pointer to a register structure
+ * @action:    the interrupt action chain for this irq
+ *
+ * Handles the action chain of an irq event
  */
-fastcall irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
-                               struct irqaction *action)
+irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
+                            struct irqaction *action)
 {
        irqreturn_t ret, retval = IRQ_NONE;
        unsigned int status = 0;
@@ -103,15 +108,22 @@ fastcall irqreturn_t handle_IRQ_event(unsigned int irq, struct pt_regs *regs,
        return retval;
 }
 
-/*
- * do_IRQ handles all normal device IRQ's (the special
+/**
+ * __do_IRQ - original all in one highlevel IRQ handler
+ * @irq:       the interrupt number
+ * @regs:      pointer to a register structure
+ *
+ * __do_IRQ handles all normal device IRQ's (the special
  * SMP cross-CPU interrupts have their own specific
  * handlers).
+ *
+ * This is the original x86 implementation which is used for every
+ * interrupt type.
  */
 fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs)
 {
-       irq_desc_t *desc = irq_desc + irq;
-       struct irqaction * action;
+       struct irq_desc *desc = irq_desc + irq;
+       struct irqaction *action;
        unsigned int status;
 
        kstat_this_cpu.irqs[irq]++;