/* Returns nid in the range [0..MAX_NUMNODES-1], or -1 if no useful numa
* info is found.
*/
-static int of_node_to_nid(struct device_node *device)
+static int of_node_to_nid_single(struct device_node *device)
{
int nid = -1;
unsigned int *tmp;
return nid;
}
+/* Walk the device tree upwards, looking for an associativity id */
+int of_node_to_nid(struct device_node *device)
+{
+ struct device_node *tmp;
+ int nid = -1;
+
+ of_node_get(device);
+ while (device) {
+ nid = of_node_to_nid_single(device);
+ if (nid != -1)
+ break;
+
+ tmp = device;
+ device = of_get_parent(tmp);
+ of_node_put(tmp);
+ }
+ of_node_put(device);
+
+ return nid;
+}
+EXPORT_SYMBOL_GPL(of_node_to_nid);
+
/*
* In theory, the "ibm,associativity" property may contain multiple
* associativity lists because a resource may be multiply connected
goto out;
}
- nid = of_node_to_nid(cpu);
+ nid = of_node_to_nid_single(cpu);
if (nid < 0 || !node_online(nid))
nid = any_online_node(NODE_MASK_ALL);
cpu = find_cpu_node(i);
BUG_ON(!cpu);
- nid = of_node_to_nid(cpu);
+ nid = of_node_to_nid_single(cpu);
of_node_put(cpu);
/*
* have associativity properties. If none, then
* everything goes to default_nid.
*/
- nid = of_node_to_nid(memory);
+ nid = of_node_to_nid_single(memory);
if (nid < 0)
nid = default_nid;
node_set_online(nid);
ha_new_range:
start = read_n_cells(n_mem_addr_cells, &memcell_buf);
size = read_n_cells(n_mem_size_cells, &memcell_buf);
- nid = of_node_to_nid(memory);
+ nid = of_node_to_nid_single(memory);
/* Domains not present at boot default to 0 */
if (nid < 0 || !node_online(nid))