394e3902c5
When we stop allocating percpu memory for not-possible CPUs we must not touch the percpu data for not-possible CPUs at all. The correct way of doing this is to test cpu_possible() or to use for_each_cpu(). This patch is a kernel-wide sweep of all instances of NR_CPUS. I found very few instances of this bug, if any. But the patch converts lots of open-coded test to use the preferred helper macros. Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Acked-by: Kyle McMartin <kyle@parisc-linux.org> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: Andi Kleen <ak@muc.de> Cc: Christian Zankel <chris@zankel.net> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: Nathan Scott <nathans@sgi.com> Cc: Jens Axboe <axboe@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
89 lines
2 KiB
C
89 lines
2 KiB
C
/*
|
|
* linux/arch/m32r/kernel/irq.c
|
|
*
|
|
* Copyright (c) 2003, 2004 Hitoshi Yamamoto
|
|
* Copyright (c) 2004 Hirokazu Takata <takata at linux-m32r.org>
|
|
*/
|
|
|
|
/*
|
|
* linux/arch/i386/kernel/irq.c
|
|
*
|
|
* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
|
|
*
|
|
* This file contains the lowest level m32r-specific interrupt
|
|
* entry and irq statistics code. All the remaining irq logic is
|
|
* done by the generic kernel/irq/ code and in the
|
|
* m32r-specific irq controller code.
|
|
*/
|
|
|
|
#include <linux/kernel_stat.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/module.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
atomic_t irq_err_count;
|
|
atomic_t irq_mis_count;
|
|
|
|
/*
|
|
* Generic, controller-independent functions:
|
|
*/
|
|
|
|
int show_interrupts(struct seq_file *p, void *v)
|
|
{
|
|
int i = *(loff_t *) v, j;
|
|
struct irqaction * action;
|
|
unsigned long flags;
|
|
|
|
if (i == 0) {
|
|
seq_printf(p, " ");
|
|
for_each_online_cpu(j)
|
|
seq_printf(p, "CPU%d ",j);
|
|
seq_putc(p, '\n');
|
|
}
|
|
|
|
if (i < NR_IRQS) {
|
|
spin_lock_irqsave(&irq_desc[i].lock, flags);
|
|
action = irq_desc[i].action;
|
|
if (!action)
|
|
goto skip;
|
|
seq_printf(p, "%3d: ",i);
|
|
#ifndef CONFIG_SMP
|
|
seq_printf(p, "%10u ", kstat_irqs(i));
|
|
#else
|
|
for_each_online_cpu(j)
|
|
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
|
|
#endif
|
|
seq_printf(p, " %14s", irq_desc[i].handler->typename);
|
|
seq_printf(p, " %s", action->name);
|
|
|
|
for (action=action->next; action; action = action->next)
|
|
seq_printf(p, ", %s", action->name);
|
|
|
|
seq_putc(p, '\n');
|
|
skip:
|
|
spin_unlock_irqrestore(&irq_desc[i].lock, flags);
|
|
} else if (i == NR_IRQS) {
|
|
seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
|
|
seq_printf(p, "MIS: %10u\n", atomic_read(&irq_mis_count));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* do_IRQ handles all normal device IRQ's (the special
|
|
* SMP cross-CPU interrupts have their own specific
|
|
* handlers).
|
|
*/
|
|
asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs)
|
|
{
|
|
irq_enter();
|
|
|
|
#ifdef CONFIG_DEBUG_STACKOVERFLOW
|
|
/* FIXME M32R */
|
|
#endif
|
|
__do_IRQ(irq, regs);
|
|
irq_exit();
|
|
|
|
return 1;
|
|
}
|