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[S390] show_interrupts: prevent cpu hotplug when walking cpu_online_map.
author
Heiko Carstens
<heiko.carstens@de.ibm.com>
Thu, 15 May 2008 14:52:39 +0000
(16:52 +0200)
committer
Martin Schwidefsky
<schwidefsky@de.ibm.com>
Thu, 15 May 2008 14:52:41 +0000
(16:52 +0200)
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>
arch/s390/kernel/irq.c
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diff --git
a/arch/s390/kernel/irq.c
b/arch/s390/kernel/irq.c
index
c59a86d
..
e7c5bfb
100644
(file)
--- a/
arch/s390/kernel/irq.c
+++ b/
arch/s390/kernel/irq.c
@@
-25,6
+25,7
@@
int show_interrupts(struct seq_file *p, void *v)
static const char *intrclass_names[] = { "EXT", "I/O", };
int i = *(loff_t *) v, j;
+ get_online_cpus();
if (i == 0) {
seq_puts(p, " ");
for_each_online_cpu(j)
@@
-43,7
+44,7
@@
int show_interrupts(struct seq_file *p, void *v)
seq_putc(p, '\n');
}
-
+ put_online_cpus();
return 0;
}