drivers/base/cpu.c: fix the output from /sys/devices/system/cpu/offline

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@novell.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index f35719aab3c1..251acea3d359 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -186,7 +186,7 @@ static ssize_t print_cpus_offline(struct sysdev_class *class,
         /* 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);