[068/200] drivers/base/cpu.c: fix the output from /sys/devices/system/cpu/offline

From: Greg KH
Date: Thu Jul 01 2010 - 17:52:30 EST


2.6.34-stable review patch. If anyone has any objections, please let me know.

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

From: Jan Beulich <JBeulich@xxxxxxxxxx>

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@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

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

--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -186,7 +186,7 @@ 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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