Messages in this thread Patch in this message | | | Date | Thu, 15 May 2008 16:57:16 +0200 | From | Martin Schwidefsky <> | Subject | [patch 11/11] show_interrupts: prevent cpu hotplug when walking cpu_online_map. |
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From: Heiko Carstens <heiko.carstens@de.ibm.com>
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 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
Index: quilt-2.6/arch/s390/kernel/irq.c =================================================================== --- quilt-2.6.orig/arch/s390/kernel/irq.c +++ quilt-2.6/arch/s390/kernel/irq.c @@ -25,6 +25,7 @@ int show_interrupts(struct seq_file *p, 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, seq_putc(p, '\n'); } - + put_online_cpus(); return 0; } -- blue skies, Martin.
"Reality continues to ruin my life." - Calvin.
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