Will call this function earlier in next coming patches.
So simply move its definition forward. And also, add comments for it.
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
---
arch/x86/mm/numa.c | 47 +++++++++++++++++++++++++++++------------------
1 file changed, 29 insertions(+), 18 deletions(-)
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 4053bb5..fea387a 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -78,6 +78,35 @@ EXPORT_SYMBOL(node_to_cpumask_map);
DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);
+/**
+ * find_near_online_node - Find the best near online node of a node.
+ * @node: NUMA node ID of the current node.
+ *
+ * Find the best near online node of @node, based on node_distance[] array.
+ * The best near online node is the backup node for memory allocation on
+ * one node.
+ *
+ * RETURNS:
+ * The best near online node ID on success, -1 on failure.
+ */
+static __init int find_near_online_node(int node)
+{
+ int n, val;
+ int min_val = INT_MAX;
+ int near_node = -1;
+
+ for_each_online_node(n) {
+ val = node_distance(node, n);
+
+ if (val < min_val) {
+ min_val = val;
+ near_node = n;
+ }
+ }
+
+ return near_node;
+}
+
void numa_set_node(int cpu, int node)
{
int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);
@@ -702,24 +731,6 @@ void __init x86_numa_init(void)
numa_init(dummy_numa_init);
}
-static __init int find_near_online_node(int node)
-{
- int n, val;
- int min_val = INT_MAX;
- int best_node = -1;
-
- for_each_online_node(n) {
- val = node_distance(node, n);
-
- if (val < min_val) {
- min_val = val;
- best_node = n;
- }
- }
-
- return best_node;
-}
-
/*
* Setup early cpu_to_node.
*
--
1.9.3
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