+/*
+ * For a given cpuset cur, partition the system as follows
+ * a. All cpus in the parent cpuset's cpus_allowed that are not part of any
+ * exclusive child cpusets
+ * b. All cpus in the current cpuset's cpus_allowed that are not part of any
+ * exclusive child cpusets
+ * Build these two partitions by calling partition_sched_domains
+ *
+ * Call with cpuset_sem held. May nest a call to the
+ * lock_cpu_hotplug()/unlock_cpu_hotplug() pair.
+ */
+
+/*
+ * Hack to avoid 2.6.13 partial node dynamic sched domain bug.
+ * Disable letting 'cpu_exclusive' cpusets define dynamic sched
+ * domains, until the sched domain can handle partial nodes.
+ * Remove this #if hackery when sched domains fixed.
+ */
+#if 0
+static void update_cpu_domains(struct cpuset *cur)
+{
+ struct cpuset *c, *par = cur->parent;
+ cpumask_t pspan, cspan;
+
+ if (par == NULL || cpus_empty(cur->cpus_allowed))
+ return;
+
+ /*
+ * Get all cpus from parent's cpus_allowed not part of exclusive
+ * children
+ */
+ pspan = par->cpus_allowed;
+ list_for_each_entry(c, &par->children, sibling) {
+ if (is_cpu_exclusive(c))
+ cpus_andnot(pspan, pspan, c->cpus_allowed);
+ }
+ if (is_removed(cur) || !is_cpu_exclusive(cur)) {
+ cpus_or(pspan, pspan, cur->cpus_allowed);
+ if (cpus_equal(pspan, cur->cpus_allowed))
+ return;
+ cspan = CPU_MASK_NONE;
+ } else {
+ if (cpus_empty(pspan))
+ return;
+ cspan = cur->cpus_allowed;
+ /*
+ * Get all cpus from current cpuset's cpus_allowed not part
+ * of exclusive children
+ */
+ list_for_each_entry(c, &cur->children, sibling) {
+ if (is_cpu_exclusive(c))
+ cpus_andnot(cspan, cspan, c->cpus_allowed);
+ }
+ }
+
+ lock_cpu_hotplug();
+ partition_sched_domains(&pspan, &cspan);
+ unlock_cpu_hotplug();
+}
+#else
+static void update_cpu_domains(struct cpuset *cur)
+{
+}
+#endif
+