[PATCH v2] mm: Drop useless local parameters of __register_one_node()

From: Dou Liyang
Date: Tue Jun 20 2017 - 22:57:56 EST


... 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().

Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: isimatu.yasuaki@xxxxxxxxxxxxxx
Signed-off-by: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
---
V1 --> V2:
Rebase it on
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm

drivers/base/node.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 73d39bc..d8dc830 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;

@@ -567,19 +567,14 @@ static void init_node_hugetlb_work(int nid) { }

int __register_one_node(int nid)
{
- int p_node = parent_node(nid);
- struct node *parent = NULL;
int error;
int cpu;

- 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