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[S390] show_interrupts: prevent cpu hotplug when walking cpu_online_map.

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Surround all the code withing show_interrupts() with
get/put_online_cpus() to prevent strange results wrt cpu hotplug.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2008-05-15 16:52:39 +02:00 committed by Martin Schwidefsky
parent 85cb185dad
commit 8dd79cb105
1 changed files with 2 additions and 1 deletions
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3
arch/s390/kernel/irq.c
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@ -25,6 +25,7 @@ int show_interrupts(struct seq_file *p, void *v)
static const char *intrclass_names[] = { "EXT", "I/O", }; static const char *intrclass_names[] = { "EXT", "I/O", };
int i = *(loff_t *) v, j; int i = *(loff_t *) v, j;
get_online_cpus();
if (i == 0) { if (i == 0) {
seq_puts(p, " "); seq_puts(p, " ");
for_each_online_cpu(j) for_each_online_cpu(j)
@ -43,7 +44,7 @@ int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n'); seq_putc(p, '\n');
} }
put_online_cpus();
return 0; return 0;
} }