diff --git a/mm/sparse.c b/mm/sparse.c
index 71288daeb366..3c19d4755909 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -221,36 +221,33 @@ void __weak __meminit vmemmap_populate_print_last(void)
 {
 }
 
-/*
- * Initialize sparse on a specific node. The node spans [pnum_begin, pnum_end)
- * And number of present sections in this node is map_count.
- */
-static void __init sparse_init_nid(int nid, unsigned long pnum_begin,
-				   unsigned long pnum_end,
-				   unsigned long map_count)
+static void __init sparse_metadata_init_nid(int nid,
+		unsigned long start_section_nr, unsigned long end_section_nr,
+		unsigned long nr_sections)
 {
-	unsigned long pnum;
 	struct mem_section_usage *usage;
+	unsigned long section_nr;
 
-	usage = memblock_alloc_node(map_count * mem_section_usage_size(),
+	usage = memblock_alloc_node(nr_sections * mem_section_usage_size(),
 				    SMP_CACHE_BYTES, nid);
 	if (!usage)
 		panic("Failed to allocate usemap for node %d\n", nid);
 
-	for_each_present_section_nr(pnum_begin, pnum) {
-		unsigned long pfn = section_nr_to_pfn(pnum);
-		struct page *map;
+	for_each_present_section_nr(start_section_nr, section_nr) {
+		const unsigned long pfn = section_nr_to_pfn(section_nr);
+		struct page *mem_map;
 
-		if (pnum >= pnum_end)
+		if (section_nr >= end_section_nr)
 			break;
 
-		map = __populate_section_memmap(pfn, PAGES_PER_SECTION,
-						nid, NULL, NULL);
-		if (!map)
-			panic("Failed to allocate memmap for section %lu\n", pnum);
+		mem_map = __populate_section_memmap(pfn, PAGES_PER_SECTION, nid,
+						    NULL, NULL);
+		if (!mem_map)
+			panic("Failed to allocate memmap for section %lu\n",
+			      section_nr);
 		memmap_boot_pages_add(section_nr_vmemmap_pages(pfn, PAGES_PER_SECTION));
-		sparse_init_one_section(__nr_to_section(pnum), pnum, map, usage,
-					SECTION_IS_EARLY);
+		sparse_init_one_section(__nr_to_section(section_nr), section_nr,
+					mem_map, usage, SECTION_IS_EARLY);
 		usage = (void *)usage + mem_section_usage_size();
 	}
 }
@@ -268,12 +265,14 @@ static void __init sparse_metadata_init(void)
 			nr_sections++;
 			continue;
 		}
-		sparse_init_nid(nid_begin, start_section_nr, section_nr, nr_sections);
+		sparse_metadata_init_nid(nid_begin, start_section_nr,
+					 section_nr, nr_sections);
 		nid_begin = nid;
 		start_section_nr = section_nr;
 		nr_sections = 1;
 	}
-	sparse_init_nid(nid_begin, start_section_nr, section_nr, nr_sections);
+	sparse_metadata_init_nid(nid_begin, start_section_nr, section_nr,
+				 nr_sections);
 }
 
 /*