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authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-05-15 10:52:39 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-05-15 10:52:41 -0400
commit8dd79cb1051723496bbdcea2247e49567cedb3ac (patch)
tree3cd9bd7b2dacb725e5b38b78494d6685dc527681 /arch/s390/kernel
parent85cb185dad54be308c3f3a6068dd7d418b8b53e4 (diff)
[S390] show_interrupts: prevent cpu hotplug when walking cpu_online_map.
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>
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r--arch/s390/kernel/irq.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index c59a86dca584..e7c5bfb7c755 100644
--- 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)
25 static const char *intrclass_names[] = { "EXT", "I/O", }; 25 static const char *intrclass_names[] = { "EXT", "I/O", };
26 int i = *(loff_t *) v, j; 26 int i = *(loff_t *) v, j;
27 27
28 get_online_cpus();
28 if (i == 0) { 29 if (i == 0) {
29 seq_puts(p, " "); 30 seq_puts(p, " ");
30 for_each_online_cpu(j) 31 for_each_online_cpu(j)
@@ -43,7 +44,7 @@ int show_interrupts(struct seq_file *p, void *v)
43 seq_putc(p, '\n'); 44 seq_putc(p, '\n');
44 45
45 } 46 }
46 47 put_online_cpus();
47 return 0; 48 return 0;
48} 49}
49 50