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powerpc/numa: Look for ibm, associativity-reference-points at the root

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If we don't find ibm,associativity-reference-points as a child of
/rtas, look for it at the root of the tree instead. We use this on
Book3E where we have no RTAS but still use the sPAPR conventions
for NUMA.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman 2011-04-10 20:42:05 +00:00 committed by Benjamin Herrenschmidt
parent 69b123684b
commit e70606eb9b
1 changed files with 7 additions and 8 deletions
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15
arch/powerpc/mm/numa.c
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@ -311,14 +311,13 @@ EXPORT_SYMBOL_GPL(of_node_to_nid);
static int __init find_min_common_depth(void)
{
int depth;
struct device_node *rtas_root;
struct device_node *chosen;
struct device_node *root;
const char *vec5;
rtas_root = of_find_node_by_path("/rtas");
if (!rtas_root)
return -1;
root = of_find_node_by_path("/rtas");
if (!root)
root = of_find_node_by_path("/");
/*
* This property is a set of 32-bit integers, each representing
@ -332,7 +331,7 @@ static int __init find_min_common_depth(void)
* NUMA boundary and the following are progressively less significant
* boundaries. There can be more than one level of NUMA.
*/
distance_ref_points = of_get_property(rtas_root,
distance_ref_points = of_get_property(root,
"ibm,associativity-reference-points",
&distance_ref_points_depth);
@ -376,11 +375,11 @@ static int __init find_min_common_depth(void)
distance_ref_points_depth = MAX_DISTANCE_REF_POINTS;
}
of_node_put(rtas_root);
of_node_put(root);
return depth;
err:
of_node_put(rtas_root);
of_node_put(root);
return -1;
}