[PATCH] mm: Drop useless local parameters of register_one_node()

[Dou Liyang]

... initializes local parameters "p_node" & "parent" for
register_node().

But, register_node() does not use them.

Remove the related code of "parent" node, cleanup register_one_node()
and register_node().

[Test in Qemu by 4 hotpluggable nodes in x86-64 system]

Signed-off-by: Dou Liyang <douly.f...@cn.fujitsu.com>
---
 drivers/base/node.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 5548f96..ea6e70ba 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -288,7 +288,7 @@ static void node_device_release(struct device *dev)
  *
  * Initialize and register the node device.
  */
-static int register_node(struct node *node, int num, struct node *parent)
+static int register_node(struct node *node, int num)
 {
        int error;
 
@@ -582,17 +582,11 @@ int register_one_node(int nid)
        int cpu;
 
        if (node_online(nid)) {
-               int p_node = parent_node(nid);
-               struct node *parent = NULL;
-
-               if (p_node != nid)
-                       parent = node_devices[p_node];
-
                node_devices[nid] = kzalloc(sizeof(struct node), GFP_KERNEL);
                if (!node_devices[nid])
                        return -ENOMEM;
 
-               error = register_node(node_devices[nid], nid, parent);
+               error = register_node(node_devices[nid], nid);
 
                /* link cpu under this node */
                for_each_present_cpu(cpu) {
-- 
2.5.5