[PATCH] x86-64: set node_possible_map at runtime - try 2

Set the node_possible_map at runtime on x86_64.  On a non NUMA system,
num_possible_nodes() will now say '1'.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
index 2efe215fc76a..1e76bb0a7277 100644
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -419,19 +419,21 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
                 return -1;
         }
 
+        node_possible_map = nodes_parsed;
+
         /* Finally register nodes */
-        for_each_node_mask(i, nodes_parsed)
+        for_each_node_mask(i, node_possible_map)
                 setup_node_bootmem(i, nodes[i].start, nodes[i].end);
         /* Try again in case setup_node_bootmem missed one due
            to missing bootmem */
-        for_each_node_mask(i, nodes_parsed)
+        for_each_node_mask(i, node_possible_map)
                 if (!node_online(i))
                         setup_node_bootmem(i, nodes[i].start, nodes[i].end);
 
         for (i = 0; i < NR_CPUS; i++) {
                 if (cpu_to_node[i] == NUMA_NO_NODE)
                         continue;
-                if (!node_isset(cpu_to_node[i], nodes_parsed))
+                if (!node_isset(cpu_to_node[i], node_possible_map))
                         numa_set_node(i, NUMA_NO_NODE);
         }
         numa_init_array();