diff options
Diffstat (limited to 'arch/blackfin/kernel/irqchip.c')
| -rw-r--r-- | arch/blackfin/kernel/irqchip.c | 46 |
1 files changed, 31 insertions, 15 deletions
diff --git a/arch/blackfin/kernel/irqchip.c b/arch/blackfin/kernel/irqchip.c index 07402f57c9de..ab8209cbbad0 100644 --- a/arch/blackfin/kernel/irqchip.c +++ b/arch/blackfin/kernel/irqchip.c @@ -36,7 +36,7 @@ #include <linux/irq.h> #include <asm/trace.h> -static unsigned long irq_err_count; +static atomic_t irq_err_count; static spinlock_t irq_controller_lock; /* @@ -48,10 +48,9 @@ void dummy_mask_unmask_irq(unsigned int irq) void ack_bad_irq(unsigned int irq) { - irq_err_count += 1; + atomic_inc(&irq_err_count); printk(KERN_ERR "IRQ: spurious interrupt %d\n", irq); } -EXPORT_SYMBOL(ack_bad_irq); static struct irq_chip bad_chip = { .ack = dummy_mask_unmask_irq, @@ -72,7 +71,7 @@ static struct irq_desc bad_irq_desc = { int show_interrupts(struct seq_file *p, void *v) { - int i = *(loff_t *) v; + int i = *(loff_t *) v, j; struct irqaction *action; unsigned long flags; @@ -80,19 +79,20 @@ int show_interrupts(struct seq_file *p, void *v) spin_lock_irqsave(&irq_desc[i].lock, flags); action = irq_desc[i].action; if (!action) - goto unlock; - - seq_printf(p, "%3d: %10u ", i, kstat_irqs(i)); + goto skip; + seq_printf(p, "%3d: ", i); + for_each_online_cpu(j) + seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); + seq_printf(p, " %8s", irq_desc[i].chip->name); seq_printf(p, " %s", action->name); for (action = action->next; action; action = action->next) - seq_printf(p, ", %s", action->name); + seq_printf(p, " %s", action->name); seq_putc(p, '\n'); - unlock: + skip: spin_unlock_irqrestore(&irq_desc[i].lock, flags); - } else if (i == NR_IRQS) { - seq_printf(p, "Err: %10lu\n", irq_err_count); - } + } else if (i == NR_IRQS) + seq_printf(p, "Err: %10u\n", atomic_read(&irq_err_count)); return 0; } @@ -101,7 +101,6 @@ int show_interrupts(struct seq_file *p, void *v) * come via this function. Instead, they should provide their * own 'handler' */ - #ifdef CONFIG_DO_IRQ_L1 __attribute__((l1_text)) #endif @@ -109,8 +108,9 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) { struct pt_regs *old_regs; struct irq_desc *desc = irq_desc + irq; +#ifndef CONFIG_IPIPE unsigned short pending, other_ints; - +#endif old_regs = set_irq_regs(regs); /* @@ -121,9 +121,24 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) desc = &bad_irq_desc; irq_enter(); - +#ifdef CONFIG_DEBUG_STACKOVERFLOW + /* Debugging check for stack overflow: is there less than STACK_WARN free? */ + { + long sp; + + sp = __get_SP() & (THREAD_SIZE-1); + + if (unlikely(sp < (sizeof(struct thread_info) + STACK_WARN))) { + dump_stack(); + printk(KERN_EMERG "%s: possible stack overflow while handling irq %i " + " only %ld bytes free\n", + __func__, irq, sp - sizeof(struct thread_info)); + } + } +#endif generic_handle_irq(irq); +#ifndef CONFIG_IPIPE /* Useless and bugous over the I-pipe: IRQs are threaded. */ /* If we're the only interrupt running (ignoring IRQ15 which is for syscalls), lower our priority to IRQ14 so that softirqs run at that level. If there's another, lower-level interrupt, irq_exit @@ -133,6 +148,7 @@ asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs) other_ints = pending & (pending - 1); if (other_ints == 0) lower_to_irq14(); +#endif /* !CONFIG_IPIPE */ irq_exit(); set_irq_regs(old_regs); |