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Subject[PATCH] - Memoryless nodes
Add support for nodes that have cpus but no memory.
The current code was failing to add these nodes
to the nodes_present_map.

Signed-off-by: Jack Steiner <steiner@sgi.com>

---
arch/x86/kernel/tlb_uv.c | 12 +++++++++++-
arch/x86/mm/srat_64.c | 5 ++++-
2 files changed, 15 insertions(+), 2 deletions(-)

Index: linux/arch/x86/mm/srat_64.c
===================================================================
--- linux.orig/arch/x86/mm/srat_64.c 2009-04-12 10:38:26.000000000 -0500
+++ linux/arch/x86/mm/srat_64.c 2009-04-12 10:38:47.000000000 -0500
@@ -28,6 +28,7 @@ int acpi_numa __initdata;
static struct acpi_table_slit *acpi_slit;

static nodemask_t nodes_parsed __initdata;
+static nodemask_t cpu_nodes_parsed __initdata;
static struct bootnode nodes[MAX_NUMNODES] __initdata;
static struct bootnode nodes_add[MAX_NUMNODES];
static int found_add_area __initdata;
@@ -174,6 +175,7 @@ acpi_numa_processor_affinity_init(struct
else
apic_id = pa->apic_id;
apicid_to_node[apic_id] = node;
+ node_set(node, cpu_nodes_parsed);
acpi_numa = 1;
printk(KERN_INFO "SRAT: PXM %u -> APIC %u -> Node %u\n",
pxm, apic_id, node);
@@ -402,7 +404,8 @@ int __init acpi_scan_nodes(unsigned long
return -1;
}

- node_possible_map = nodes_parsed;
+ /* Account for nodes with cpus and no memory */
+ nodes_or(node_possible_map, nodes_parsed, cpu_nodes_parsed);

/* Finally register nodes */
for_each_node_mask(i, node_possible_map)

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