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From: Greg KH on 1 Jul 2010 18:10
2.6.33-stable review patch. If anyone has any objections, please let me know.

------------------

From: Jan Beulich <JBeulich(a)novell.com>

commit cdc6e3d3968052cebb2f2ddcd742bff29fbd1a90 upstream.

Without CONFIG_CPUMASK_OFFSTACK, simply inverting cpu_online_mask leads
to CPUs beyond nr_cpu_ids to be displayed twice and CPUs not even
possible to be displayed as offline.

Signed-off-by: Jan Beulich <jbeulich(a)novell.com>
Cc: Andi Kleen <ak(a)linux.intel.com>
Cc: Stephen Rothwell <sfr(a)canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
drivers/base/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -183,7 +183,7 @@ static ssize_t print_cpus_offline(struct
/* display offline cpus < nr_cpu_ids */
if (!alloc_cpumask_var(&offline, GFP_KERNEL))
return -ENOMEM;
- cpumask_complement(offline, cpu_online_mask);
+ cpumask_andnot(offline, cpu_possible_mask, cpu_online_mask);
n = cpulist_scnprintf(buf, len, offline);
free_cpumask_var(offline);



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