[PATCH] sched: build_sched_domains() fix

Use the correct groups while initializing sched groups power for
allnodes_domain.  This fixes the crash observed while creating exclusive
cpusets.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Reported-and-tested-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index b44b9a43b0fc..41a571806ce0 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6494,7 +6494,12 @@ static int build_sched_domains(const cpumask_t *cpu_map)
         for (i = 0; i < MAX_NUMNODES; i++)
                 init_numa_sched_groups_power(sched_group_nodes[i]);
 
-        init_numa_sched_groups_power(sched_group_allnodes);
+        if (sched_group_allnodes) {
+                int group = cpu_to_allnodes_group(first_cpu(*cpu_map));
+                struct sched_group *sg = &sched_group_allnodes[group];
+
+                init_numa_sched_groups_power(sg);
+        }
 #endif
 
         /* Attach the domains */