239007b844
Convert locks which cannot be sleeping locks in preempt-rt to raw_spinlocks. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Ingo Molnar <mingo@elte.hu>
96 lines
2.0 KiB
C
96 lines
2.0 KiB
C
/*
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* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2007-2009 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/hardirq.h>
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#include <linux/interrupt.h>
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#include <linux/irqflags.h>
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#include <linux/seq_file.h>
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#include <linux/kernel_stat.h>
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#include <linux/irq.h>
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#include <asm/prom.h>
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unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
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{
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struct of_irq oirq;
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if (of_irq_map_one(dev, index, &oirq))
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return NO_IRQ;
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return oirq.specifier[0];
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}
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EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
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static u32 concurrent_irq;
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void do_IRQ(struct pt_regs *regs)
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{
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unsigned int irq;
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struct pt_regs *old_regs = set_irq_regs(regs);
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irq_enter();
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irq = get_irq(regs);
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next_irq:
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BUG_ON(irq == -1U);
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generic_handle_irq(irq);
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irq = get_irq(regs);
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if (irq != -1U) {
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pr_debug("next irq: %d\n", irq);
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++concurrent_irq;
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goto next_irq;
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}
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irq_exit();
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set_irq_regs(old_regs);
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}
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int show_interrupts(struct seq_file *p, void *v)
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{
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int i = *(loff_t *) v, j;
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struct irqaction *action;
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unsigned long flags;
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if (i == 0) {
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seq_printf(p, " ");
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for_each_online_cpu(j)
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seq_printf(p, "CPU%-8d", j);
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seq_putc(p, '\n');
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}
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if (i < nr_irq) {
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raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
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action = irq_desc[i].action;
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if (!action)
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goto skip;
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seq_printf(p, "%3d: ", i);
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#ifndef CONFIG_SMP
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seq_printf(p, "%10u ", kstat_irqs(i));
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#else
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for_each_online_cpu(j)
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seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
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#endif
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seq_printf(p, " %8s", irq_desc[i].status &
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IRQ_LEVEL ? "level" : "edge");
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seq_printf(p, " %8s", irq_desc[i].chip->name);
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seq_printf(p, " %s", action->name);
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for (action = action->next; action; action = action->next)
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seq_printf(p, ", %s", action->name);
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seq_putc(p, '\n');
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skip:
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raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
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}
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return 0;
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}
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