mm: make register_mem_sect_under_node() static

It is only used internally.

Link: http://lkml.kernel.org/r/20190614100114.311-4-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/base/node.c

@@ -753,7 +753,8 @@ static int __ref get_nid_for_pfn(unsigned long pfn)
 }
 
 /* register memory section under specified node if it spans that node */
-int register_mem_sect_under_node(struct memory_block *mem_blk, void *arg)
+static int register_mem_sect_under_node(struct memory_block *mem_blk,
+					 void *arg)
 {
 	int ret, nid = *(int *)arg;
 	unsigned long pfn, sect_start_pfn, sect_end_pfn;

include/linux/node.h

@@ -137,8 +137,6 @@ static inline int register_one_node(int nid)
 extern void unregister_one_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 int register_mem_sect_under_node(struct memory_block *mem_blk,
-						void *arg);
 extern void unregister_memory_block_under_nodes(struct memory_block *mem_blk);
 
 extern int register_memory_node_under_compute_node(unsigned int mem_nid,
@@ -170,11 +168,6 @@ static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
 {
 	return 0;
 }
-static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
-							void *arg)
-{
-	return 0;
-}
 static inline void unregister_memory_block_under_nodes(struct memory_block *mem_blk)
 {
 }