drivers/base/node: fold unregister_node() into unregister_one_node()

unregister_node() is only called from unregister_one_node().  This patch
folds unregister_node() into its only caller and renames
unregister_one_node() to unregister_node().

This reduces unnecessary indirection and simplifies the code structure. 
No functional changes are introduced.

[donettom@linux.ibm.com: remove extra spaces before @nid and "All"]
  Link: https://lkml.kernel.org/r/cff01514-9074-4c97-bcf1-d4e3594e48b0@linux.ibm.com
Link: https://lkml.kernel.org/r/32b7d5d8f0f30d313c3e1d8798f591459c8746f9.1760097208.git.donettom@linux.ibm.com
Signed-off-by: Donet Tom <donettom@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: SeongJae Park <sj@kernel.org>
Cc: Aboorva Devarajan <aboorvad@linux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

3 files changed, 21 insertions, 27 deletions

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 17d7b90403ff..00cf4532f121 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -676,23 +676,6 @@ static void node_device_release(struct device *dev)
 	kfree(to_node(dev));
 }
 
-/**
- * unregister_node - unregister a node device
- * @node: node going away
- *
- * Unregisters a node device @node.  All the devices on the node must be
- * unregistered before calling this function.
- */
-void unregister_node(struct node *node)
-{
-	hugetlb_unregister_node(node);
-	compaction_unregister_node(node);
-	reclaim_unregister_node(node);
-	node_remove_accesses(node);
-	node_remove_caches(node);
-	device_unregister(&node->dev);
-}
-
 struct node *node_devices[MAX_NUMNODES];
 
 /*
@@ -924,13 +907,26 @@ int register_node(int nid)
 
 	return error;
 }
-
-void unregister_one_node(int nid)
+/**
+ * unregister_node - unregister a node device
+ * @nid: nid of the node going away
+ *
+ * Unregisters the node device at node id @nid. All the devices on the
+ * node must be unregistered before calling this function.
+ */
+void unregister_node(int nid)
 {
-	if (!node_devices[nid])
+	struct node *node = node_devices[nid];
+
+	if (!node)
 		return;
 
-	unregister_node(node_devices[nid]);
+	hugetlb_unregister_node(node);
+	compaction_unregister_node(node);
+	reclaim_unregister_node(node);
+	node_remove_accesses(node);
+	node_remove_caches(node);
+	device_unregister(&node->dev);
 	node_devices[nid] = NULL;
 }
 
diff --git a/include/linux/node.h b/include/linux/node.h
index b7028d3ec3b4..0269b064ba65 100644
--- a/include/linux/node.h
+++ b/include/linux/node.h
@@ -132,8 +132,6 @@ static inline void register_memory_blocks_under_nodes(void)
 }
 #endif
 
-extern void unregister_node(struct node *node);
-
 struct node_notify {
 	int nid;
 };
@@ -177,7 +175,7 @@ static inline int hotplug_node_notifier(notifier_fn_t fn, int pri)
 extern void node_dev_init(void);
 /* Core of the node registration - only memory hotplug should use this */
 int register_node(int nid);
-extern void unregister_one_node(int nid);
+void unregister_node(int nid);
 extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
 extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
 extern void unregister_memory_block_under_nodes(struct memory_block *mem_blk);
@@ -193,7 +191,7 @@ static inline int register_node(int nid)
 {
 	return 0;
 }
-static inline int unregister_one_node(int nid)
+static inline int unregister_node(int nid)
 {
 	return 0;
 }
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 6c050d867031..94a8f6e8811a 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1596,7 +1596,7 @@ int add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 error:
 	if (new_node) {
 		node_set_offline(nid);
-		unregister_one_node(nid);
+		unregister_node(nid);
 	}
 error_memblock_remove:
 	if (IS_ENABLED(CONFIG_ARCH_KEEP_MEMBLOCK))
@@ -2201,7 +2201,7 @@ void try_offline_node(int nid)
 	 * node now.
 	 */
 	node_set_offline(nid);
-	unregister_one_node(nid);
+	unregister_node(nid);
 }
 EXPORT_SYMBOL(try_offline_node);