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Subject[PATCH] x86, UV: Fix initialization of max_pnode
Fix calculation of "max_pnode" for systems where the the highest blade
has neither cpus or memory. (And, yes, although rare this does occur).

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


---
arch/x86/kernel/apic/x2apic_uv_x.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

Index: linux/arch/x86/kernel/apic/x2apic_uv_x.c
===================================================================
--- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c 2010-09-10 10:01:06.365597713 -0500
+++ linux/arch/x86/kernel/apic/x2apic_uv_x.c 2010-09-10 10:01:23.993663058 -0500
@@ -698,9 +698,11 @@ void __init uv_system_init(void)
for (j = 0; j < 64; j++) {
if (!test_bit(j, &present))
continue;
- uv_blade_info[blade].pnode = (i * 64 + j);
+ pnode = (i * 64 + j);
+ uv_blade_info[blade].pnode = pnode;
uv_blade_info[blade].nr_possible_cpus = 0;
uv_blade_info[blade].nr_online_cpus = 0;
+ max_pnode = max(pnode, max_pnode);
blade++;
}
}
@@ -738,7 +740,6 @@ void __init uv_system_init(void)
uv_cpu_hub_info(cpu)->scir.offset = uv_scir_offset(apicid);
uv_node_to_blade[nid] = blade;
uv_cpu_to_blade[cpu] = blade;
- max_pnode = max(pnode, max_pnode);
}

/* Add blade/pnode info for nodes without cpus */
@@ -750,7 +751,6 @@ void __init uv_system_init(void)
pnode = (paddr >> m_val) & pnode_mask;
blade = boot_pnode_to_blade(pnode);
uv_node_to_blade[nid] = blade;
- max_pnode = max(pnode, max_pnode);
}

map_gru_high(max_pnode);

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