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From: Jan Beulich on 19 Mar 2010 12:20
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>

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

--- linux-2.6.34-rc1/drivers/base/cpu.c
+++ 2.6.34-rc1-cpus-offline-display/drivers/base/cpu.c
@@ -185,7 +185,7 @@ 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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