From: Siddha, Suresh B <suresh.b.siddha@intel.com>
Date: Sun, 30 Jul 2006 10:02:59 +0000 (-0700)
Subject: [PATCH] sched: build_sched_domains() fix
X-Git-Tag: v2.6.18-rc4~151
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f712c0c7e1796f92e45e4de144e247816d974b8f;p=linux-2.6

[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>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index b44b9a43b0..41a571806c 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 */