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Diffstat (limited to 'kernel/irq/handle.c')
-rw-r--r--kernel/irq/handle.c36
1 files changed, 25 insertions, 11 deletions
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index f51eaee921b..9ebf7796887 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -82,19 +82,21 @@ static struct irq_desc irq_desc_init = {
void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr)
{
- unsigned long bytes;
- char *ptr;
int node;
-
- /* Compute how many bytes we need per irq and allocate them */
- bytes = nr * sizeof(unsigned int);
+ void *ptr;
node = cpu_to_node(cpu);
- ptr = kzalloc_node(bytes, GFP_ATOMIC, node);
- printk(KERN_DEBUG " alloc kstat_irqs on cpu %d node %d\n", cpu, node);
+ ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs), GFP_ATOMIC, node);
- if (ptr)
- desc->kstat_irqs = (unsigned int *)ptr;
+ /*
+ * don't overwite if can not get new one
+ * init_copy_kstat_irqs() could still use old one
+ */
+ if (ptr) {
+ printk(KERN_DEBUG " alloc kstat_irqs on cpu %d node %d\n",
+ cpu, node);
+ desc->kstat_irqs = ptr;
+ }
}
static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)
@@ -237,6 +239,7 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
}
};
+static unsigned int kstat_irqs_all[NR_IRQS][NR_CPUS];
int __init early_irq_init(void)
{
struct irq_desc *desc;
@@ -253,6 +256,7 @@ int __init early_irq_init(void)
for (i = 0; i < count; i++) {
desc[i].irq = i;
init_alloc_desc_masks(&desc[i], 0, true);
+ desc[i].kstat_irqs = kstat_irqs_all[i];
}
return arch_early_irq_init();
}
@@ -268,6 +272,11 @@ struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
}
#endif /* !CONFIG_SPARSE_IRQ */
+void clear_kstat_irqs(struct irq_desc *desc)
+{
+ memset(desc->kstat_irqs, 0, nr_cpu_ids * sizeof(*(desc->kstat_irqs)));
+}
+
/*
* What should we do if we get a hw irq event on an illegal vector?
* Each architecture has to answer this themself.
@@ -341,6 +350,8 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
irqreturn_t ret, retval = IRQ_NONE;
unsigned int status = 0;
+ WARN_ONCE(!in_irq(), "BUG: IRQ handler called from non-hardirq context!");
+
if (!(action->flags & IRQF_DISABLED))
local_irq_enable_in_hardirq();
@@ -360,6 +371,11 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
}
#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
+
+#ifdef CONFIG_ENABLE_WARN_DEPRECATED
+# warning __do_IRQ is deprecated. Please convert to proper flow handlers
+#endif
+
/**
* __do_IRQ - original all in one highlevel IRQ handler
* @irq: the interrupt number
@@ -480,12 +496,10 @@ void early_init_irq_lock_class(void)
}
}
-#ifdef CONFIG_SPARSE_IRQ
unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
{
struct irq_desc *desc = irq_to_desc(irq);
return desc ? desc->kstat_irqs[cpu] : 0;
}
-#endif
EXPORT_SYMBOL(kstat_irqs_cpu);