diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c
index c6625e8..1f7c74c 100644
--- a/arch/arm/mm/kasan_init.c
+++ b/arch/arm/mm/kasan_init.c
@@ -262,12 +262,6 @@ void __init kasan_init(void)
 				&pa_start, &pa_end, &arm_lowmem_limit);
 			end = __va(arm_lowmem_limit);
 		}
-		if (start >= end) {
-			pr_info("Skipping invalid memory block %pa-%pa (virtual %p-%p)\n",
-				&pa_start, &pa_end, start, end);
-			continue;
-		}
-
 		create_mapping(start, end);
 	}
 
diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c
index 3fcad95..45fbdce 100644
--- a/arch/arm64/mm/kasan_init.c
+++ b/arch/arm64/mm/kasan_init.c
@@ -353,9 +353,6 @@ static void __init kasan_init_shadow(void)
 		void *start = (void *)__phys_to_virt(pa_start);
 		void *end = (void *)__phys_to_virt(pa_end);
 
-		if (start >= end)
-			break;
-
 		kasan_map_populate((unsigned long)kasan_mem_to_shadow(start),
 				   (unsigned long)kasan_mem_to_shadow(end),
 				   early_pfn_to_nid(virt_to_pfn(start)));
diff --git a/arch/loongarch/kernel/numa.c b/arch/loongarch/kernel/numa.c
index 8b89898..c96c536 100644
--- a/arch/loongarch/kernel/numa.c
+++ b/arch/loongarch/kernel/numa.c
@@ -216,7 +216,6 @@ static int __init fake_numa_init(void)
 	phys_addr_t start = memblock_start_of_DRAM();
 	phys_addr_t end = memblock_end_of_DRAM() - 1;
 
-	node_set(0, numa_nodes_parsed);
 	pr_info("Faking a node at [mem %pap-%pap]\n", &start, &end);
 
 	return numa_add_memblk(0, start, end + 1);
diff --git a/arch/loongarch/mm/kasan_init.c b/arch/loongarch/mm/kasan_init.c
index 0fc02ca..92ca0ba 100644
--- a/arch/loongarch/mm/kasan_init.c
+++ b/arch/loongarch/mm/kasan_init.c
@@ -305,9 +305,6 @@ void __init kasan_init(void)
 		void *start = (void *)phys_to_virt(pa_start);
 		void *end   = (void *)phys_to_virt(pa_end);
 
-		if (start >= end)
-			break;
-
 		kasan_map_populate((unsigned long)mem_to_shadow(start),
 			(unsigned long)mem_to_shadow(end), NUMA_NO_NODE);
 	}
diff --git a/arch/powerpc/mm/kasan/init_book3e_64.c b/arch/powerpc/mm/kasan/init_book3e_64.c
index 0d3a73d..0ed372f 100644
--- a/arch/powerpc/mm/kasan/init_book3e_64.c
+++ b/arch/powerpc/mm/kasan/init_book3e_64.c
@@ -68,9 +68,6 @@ static void __init kasan_init_phys_region(void *start, void *end)
 	unsigned long k_start, k_end, k_cur;
 	void *va;
 
-	if (start >= end)
-		return;
-
 	k_start = ALIGN_DOWN((unsigned long)kasan_mem_to_shadow(start), PAGE_SIZE);
 	k_end = ALIGN((unsigned long)kasan_mem_to_shadow(end), PAGE_SIZE);
 
diff --git a/arch/powerpc/mm/kasan/init_book3s_64.c b/arch/powerpc/mm/kasan/init_book3s_64.c
index dcafa64..ccfbfb8 100644
--- a/arch/powerpc/mm/kasan/init_book3s_64.c
+++ b/arch/powerpc/mm/kasan/init_book3s_64.c
@@ -24,9 +24,6 @@ static void __init kasan_init_phys_region(void *start, void *end)
 	unsigned long k_start, k_end, k_cur;
 	void *va;
 
-	if (start >= end)
-		return;
-
 	k_start = ALIGN_DOWN((unsigned long)kasan_mem_to_shadow(start), PAGE_SIZE);
 	k_end = ALIGN((unsigned long)kasan_mem_to_shadow(end), PAGE_SIZE);
 
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 01d252c..3de5ea2 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -1239,8 +1239,6 @@ static void __init create_linear_mapping_page_table(void)
 
 	/* Map all memory banks in the linear mapping */
 	for_each_mem_range(i, &start, &end) {
-		if (start >= end)
-			break;
 		if (start <= __pa(PAGE_OFFSET) &&
 		    __pa(PAGE_OFFSET) < end)
 			start = __pa(PAGE_OFFSET);
diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c
index c4a2a9e..1f3aa96 100644
--- a/arch/riscv/mm/kasan_init.c
+++ b/arch/riscv/mm/kasan_init.c
@@ -512,9 +512,6 @@ void __init kasan_init(void)
 		void *start = (void *)__va(p_start);
 		void *end = (void *)__va(p_end);
 
-		if (start >= end)
-			break;
-
 		kasan_populate(kasan_mem_to_shadow(start), kasan_mem_to_shadow(end));
 	}
 
diff --git a/arch/x86/mm/amdtopology.c b/arch/x86/mm/amdtopology.c
index f980b0e..1cb581b 100644
--- a/arch/x86/mm/amdtopology.c
+++ b/arch/x86/mm/amdtopology.c
@@ -150,7 +150,6 @@ int __init amd_numa_init(void)
 
 		prevbase = base;
 		numa_add_memblk(nodeid, base, limit);
-		node_set(nodeid, numa_nodes_parsed);
 	}
 
 	if (nodes_empty(numa_nodes_parsed))
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 99d0a93..ced66e6 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -216,7 +216,6 @@ static int __init dummy_numa_init(void)
 	printk(KERN_INFO "Faking a node at [mem %#018Lx-%#018Lx]\n",
 	       0LLU, PFN_PHYS(max_pfn) - 1);
 
-	node_set(0, numa_nodes_parsed);
 	node_set(0, numa_phys_nodes_parsed);
 	numa_add_memblk(0, 0, PFN_PHYS(max_pfn));
 
diff --git a/drivers/base/arch_numa.c b/drivers/base/arch_numa.c
index c99f2ab..d4e426a 100644
--- a/drivers/base/arch_numa.c
+++ b/drivers/base/arch_numa.c
@@ -221,9 +221,6 @@ static int __init numa_register_nodes(void)
 		node_set_online(nid);
 	}
 
-	/* Setup online nodes to actual nodes*/
-	node_possible_map = numa_nodes_parsed;
-
 	return 0;
 }
 
@@ -283,7 +280,6 @@ static int __init dummy_numa_init(void)
 		pr_err("NUMA init failed\n");
 		return ret;
 	}
-	node_set(0, numa_nodes_parsed);
 
 	numa_off = true;
 	return 0;
diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c
index cd2dc8e..230d5f6 100644
--- a/drivers/of/of_numa.c
+++ b/drivers/of/of_numa.c
@@ -59,11 +59,8 @@ static int __init of_numa_parse_memory_nodes(void)
 			r = -EINVAL;
 		}
 
-		for (i = 0; !r && !of_address_to_resource(np, i, &rsrc); i++) {
+		for (i = 0; !r && !of_address_to_resource(np, i, &rsrc); i++)
 			r = numa_add_memblk(nid, rsrc.start, rsrc.end + 1);
-			if (!r)
-				node_set(nid, numa_nodes_parsed);
-		}
 
 		if (!i || r) {
 			of_node_put(np);
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 7c9d667..06c58cb 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -289,7 +289,7 @@ static inline void __remove_memory(u64 start, u64 size) {}
 /* Default online_type (MMOP_*) when new memory blocks are added. */
 extern enum mmop mhp_get_default_online_type(void);
 extern void mhp_set_default_online_type(enum mmop online_type);
-extern void __ref free_area_init_core_hotplug(struct pglist_data *pgdat);
+int __ref free_area_init_core_hotplug(struct pglist_data *pgdat);
 extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
 extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
 extern int add_memory_resource(int nid, struct resource *resource,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e93c4d2..ed26105 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4444,15 +4444,12 @@ hugetlb_early_param("default_hugepagesz", default_hugepagesz_setup);
 void __init hugetlb_bootmem_set_nodes(void)
 {
 	int i, nid;
-	unsigned long start_pfn, end_pfn;
 
 	if (!nodes_empty(hugetlb_bootmem_nodes))
 		return;
 
-	for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid) {
-		if (end_pfn > start_pfn)
-			node_set(nid, hugetlb_bootmem_nodes);
-	}
+	for_each_mem_pfn_range(i, MAX_NUMNODES, NULL, NULL, &nid)
+		node_set(nid, hugetlb_bootmem_nodes);
 }
 
 void __init hugetlb_bootmem_alloc(void)
diff --git a/mm/memblock.c b/mm/memblock.c
index 6349c48..43e036f 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -2224,10 +2224,8 @@ static void __init free_unused_memmap(void)
 	}
 
 #ifdef CONFIG_SPARSEMEM
-	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION)) {
-		prev_end = pageblock_align(end);
+	if (!IS_ALIGNED(prev_end, PAGES_PER_SECTION))
 		free_memmap(prev_end, ALIGN(prev_end, PAGES_PER_SECTION));
-	}
 #endif
 }
 
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 7ac19fa..8b13732 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1263,7 +1263,8 @@ static pg_data_t *hotadd_init_pgdat(int nid)
 	pgdat = NODE_DATA(nid);
 
 	/* init node's zones as empty zones, we don't have any present pages.*/
-	free_area_init_core_hotplug(pgdat);
+	if (free_area_init_core_hotplug(pgdat))
+		return NULL;
 
 	/*
 	 * The node we allocated has no zone fallback lists. For avoiding
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 498d62c..2aa7f80 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -332,8 +332,7 @@ static unsigned long __init early_calculate_totalpages(void)
 		unsigned long pages = end_pfn - start_pfn;
 
 		totalpages += pages;
-		if (pages)
-			node_set_state(nid, N_MEMORY);
+		node_set_state(nid, N_MEMORY);
 	}
 	return totalpages;
 }
@@ -799,28 +798,6 @@ void __meminit init_deferred_page(unsigned long pfn, int nid)
 	__init_deferred_page(pfn, nid);
 }
 
-/* If zone is ZONE_MOVABLE but memory is mirrored, it is an overlapped init */
-static bool __meminit
-overlap_memmap_init(unsigned long zone, unsigned long *pfn)
-{
-	static struct memblock_region *r __meminitdata;
-
-	if (mirrored_kernelcore && zone == ZONE_MOVABLE) {
-		if (!r || *pfn >= memblock_region_memory_end_pfn(r)) {
-			for_each_mem_region(r) {
-				if (*pfn < memblock_region_memory_end_pfn(r))
-					break;
-			}
-		}
-		if (*pfn >= memblock_region_memory_base_pfn(r) &&
-		    memblock_is_mirror(r)) {
-			*pfn = memblock_region_memory_end_pfn(r);
-			return true;
-		}
-	}
-	return false;
-}
-
 /*
  * Only struct pages that correspond to ranges defined by memblock.memory
  * are zeroed and initialized by going through __init_single_page() during
@@ -907,8 +884,6 @@ void __meminit memmap_init_range(unsigned long size, int nid, unsigned long zone
 		 * function.  They do not exist on hotplugged memory.
 		 */
 		if (context == MEMINIT_EARLY) {
-			if (overlap_memmap_init(zone, &pfn))
-				continue;
 			if (defer_init(nid, pfn, zone_end_pfn)) {
 				deferred_struct_pages = true;
 				break;
@@ -1174,9 +1149,8 @@ static void __init adjust_zone_range_for_zone_movable(int nid,
 				arch_zone_highest_possible_pfn[movable_zone]);
 
 		/* Adjust for ZONE_MOVABLE starting within this range */
-		} else if (!mirrored_kernelcore &&
-			*zone_start_pfn < zone_movable_pfn[nid] &&
-			*zone_end_pfn > zone_movable_pfn[nid]) {
+		} else if (*zone_start_pfn < zone_movable_pfn[nid] &&
+			   *zone_end_pfn > zone_movable_pfn[nid]) {
 			*zone_end_pfn = zone_movable_pfn[nid];
 
 		/* Check if this whole range is within ZONE_MOVABLE */
@@ -1224,40 +1198,11 @@ static unsigned long __init zone_absent_pages_in_node(int nid,
 					unsigned long zone_start_pfn,
 					unsigned long zone_end_pfn)
 {
-	unsigned long nr_absent;
-
 	/* zone is empty, we don't have any absent pages */
 	if (zone_start_pfn == zone_end_pfn)
 		return 0;
 
-	nr_absent = __absent_pages_in_range(nid, zone_start_pfn, zone_end_pfn);
-
-	/*
-	 * ZONE_MOVABLE handling.
-	 * Treat pages to be ZONE_MOVABLE in ZONE_NORMAL as absent pages
-	 * and vice versa.
-	 */
-	if (mirrored_kernelcore && zone_movable_pfn[nid]) {
-		unsigned long start_pfn, end_pfn;
-		struct memblock_region *r;
-
-		for_each_mem_region(r) {
-			start_pfn = clamp(memblock_region_memory_base_pfn(r),
-					  zone_start_pfn, zone_end_pfn);
-			end_pfn = clamp(memblock_region_memory_end_pfn(r),
-					zone_start_pfn, zone_end_pfn);
-
-			if (zone_type == ZONE_MOVABLE &&
-			    memblock_is_mirror(r))
-				nr_absent += end_pfn - start_pfn;
-
-			if (zone_type == ZONE_NORMAL &&
-			    !memblock_is_mirror(r))
-				nr_absent += end_pfn - start_pfn;
-		}
-	}
-
-	return nr_absent;
+	return __absent_pages_in_range(nid, zone_start_pfn, zone_end_pfn);
 }
 
 /*
@@ -1338,7 +1283,7 @@ static void __init calculate_node_totalpages(struct pglist_data *pgdat,
 						unsigned long node_start_pfn,
 						unsigned long node_end_pfn)
 {
-	unsigned long realtotalpages = 0, totalpages = 0;
+	unsigned long realtotalpages = 0;
 	enum zone_type i;
 
 	for (i = 0; i < MAX_NR_ZONES; i++) {
@@ -1368,11 +1313,10 @@ static void __init calculate_node_totalpages(struct pglist_data *pgdat,
 		zone->present_early_pages = real_size;
 #endif
 
-		totalpages += spanned;
 		realtotalpages += real_size;
 	}
 
-	pgdat->node_spanned_pages = totalpages;
+	pgdat->node_spanned_pages = node_end_pfn - node_start_pfn;
 	pgdat->node_present_pages = realtotalpages;
 	pr_debug("On node %d totalpages: %lu\n", pgdat->node_id, realtotalpages);
 }
@@ -1536,7 +1480,7 @@ void __init set_pageblock_order(void)
  * NOTE: this function is only called during memory hotplug
  */
 #ifdef CONFIG_MEMORY_HOTPLUG
-void __ref free_area_init_core_hotplug(struct pglist_data *pgdat)
+int __ref free_area_init_core_hotplug(struct pglist_data *pgdat)
 {
 	int nid = pgdat->node_id;
 	enum zone_type z;
@@ -1544,8 +1488,14 @@ void __ref free_area_init_core_hotplug(struct pglist_data *pgdat)
 
 	pgdat_init_internals(pgdat);
 
-	if (pgdat->per_cpu_nodestats == &boot_nodestats)
-		pgdat->per_cpu_nodestats = alloc_percpu(struct per_cpu_nodestat);
+	if (pgdat->per_cpu_nodestats == &boot_nodestats) {
+		struct per_cpu_nodestat __percpu *p;
+
+		p = alloc_percpu(struct per_cpu_nodestat);
+		if (!p)
+			return -ENOMEM;
+		pgdat->per_cpu_nodestats = p;
+	}
 
 	/*
 	 * Reset the nr_zones, order and highest_zoneidx before reuse.
@@ -1583,6 +1533,8 @@ void __ref free_area_init_core_hotplug(struct pglist_data *pgdat)
 		zone->present_pages = 0;
 		zone_init_internals(zone, z, nid, 0);
 	}
+
+	return 0;
 }
 #endif
 
@@ -1720,7 +1672,6 @@ static void __init free_area_init_node(int nid)
 
 	pgdat->node_id = nid;
 	pgdat->node_start_pfn = start_pfn;
-	pgdat->per_cpu_nodestats = NULL;
 
 	if (start_pfn != end_pfn) {
 		pr_info("Initmem setup node %d [mem %#018Lx-%#018Lx]\n", nid,
@@ -1843,7 +1794,6 @@ static void __init free_area_init(void)
 	}
 
 	/* Find the PFNs that ZONE_MOVABLE begins at in each node */
-	memset(zone_movable_pfn, 0, sizeof(zone_movable_pfn));
 	find_zone_movable_pfns_for_nodes();
 
 	/* Print out the zone ranges */
@@ -2214,10 +2164,13 @@ bool __init deferred_grow_zone(struct zone *zone, unsigned int order)
 	}
 
 	/*
-	 * There were no pages to initialize and free which means the zone's
-	 * memory map is completely initialized.
+	 * The loop only tests spfn before entering an iteration, so on exit it
+	 * may point up to a section past the end of the zone.  When it does,
+	 * the rest of the zone has already been handed to
+	 * deferred_init_memmap_chunk() and nothing is left to initialize.
 	 */
-	pgdat->first_deferred_pfn = nr_pages ? spfn : ULONG_MAX;
+	pgdat->first_deferred_pfn =
+		spfn < zone_end_pfn(zone) ? spfn : ULONG_MAX;
 
 	pgdat_resize_unlock(pgdat, &flags);
 
diff --git a/mm/numa_memblks.c b/mm/numa_memblks.c
index 3c3c4ea..be6e734 100644
--- a/mm/numa_memblks.c
+++ b/mm/numa_memblks.c
@@ -17,20 +17,6 @@ nodemask_t numa_nodes_parsed __initdata;
 static struct numa_meminfo numa_meminfo __initdata_or_meminfo;
 static struct numa_meminfo numa_reserved_meminfo __initdata_or_meminfo;
 
-/*
- * Set nodes, which have memory in @mi, in *@nodemask.
- */
-static void __init numa_nodemask_from_meminfo(nodemask_t *nodemask,
-					      const struct numa_meminfo *mi)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(mi->blk); i++)
-		if (mi->blk[i].start != mi->blk[i].end &&
-		    mi->blk[i].nid != NUMA_NO_NODE)
-			node_set(mi->blk[i].nid, *nodemask);
-}
-
 /**
  * numa_reset_distance - Reset NUMA distance table
  *
@@ -56,7 +42,6 @@ static int __init numa_alloc_distance(void)
 
 	/* size the new table and allocate it */
 	nodes_parsed = numa_nodes_parsed;
-	numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo);
 
 	for_each_node_mask(i, nodes_parsed)
 		cnt = i;
@@ -135,13 +120,20 @@ EXPORT_SYMBOL(__node_distance);
 static int __init numa_add_memblk_to(int nid, u64 start, u64 end,
 				     struct numa_meminfo *mi)
 {
+	/* whine about and ignore invalid nid */
+	if (nid < 0 || nid >= MAX_NUMNODES) {
+		pr_warn("Warning: invalid memblk node id %d [mem %#010Lx-%#010Lx]\n",
+			nid, start, end - 1);
+		return -EINVAL;
+	}
+
 	/* ignore zero length blks */
 	if (start == end)
 		return 0;
 
-	/* whine about and ignore invalid blks */
-	if (start > end || nid < 0 || nid >= MAX_NUMNODES) {
-		pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
+	/* whine about and ignore invalid ranges */
+	if (start > end) {
+		pr_warn("Warning: invalid memblk range for node %d [mem %#010Lx-%#010Lx]\n",
 			nid, start, end - 1);
 		return 0;
 	}
@@ -193,13 +185,20 @@ static void __init numa_move_tail_memblk(struct numa_meminfo *dst, int idx,
  * @end: End address of the new memblk
  *
  * Add a new memblk to the default numa_meminfo.
+ * On success @nid is also set in numa_nodes_parsed.
  *
  * RETURNS:
  * 0 on success, -errno on failure.
  */
 int __init numa_add_memblk(int nid, u64 start, u64 end)
 {
-	return numa_add_memblk_to(nid, start, end, &numa_meminfo);
+	int ret;
+
+	ret = numa_add_memblk_to(nid, start, end, &numa_meminfo);
+	if (!ret)
+		node_set(nid, numa_nodes_parsed);
+
+	return ret;
 }
 
 /**
@@ -256,8 +255,7 @@ int __init numa_cleanup_meminfo(struct numa_meminfo *mi)
 
 		/* preserve info for non-RAM areas above 'max_pfn': */
 		if (bi->end > high) {
-			numa_add_memblk_to(bi->nid, high, bi->end,
-					   &numa_reserved_meminfo);
+			numa_add_reserved_memblk(bi->nid, high, bi->end);
 			bi->end = high;
 		}
 
@@ -401,7 +399,6 @@ static int __init numa_register_meminfo(struct numa_meminfo *mi)
 
 	/* Account for nodes with cpus and no memory */
 	node_possible_map = numa_nodes_parsed;
-	numa_nodemask_from_meminfo(&node_possible_map, mi);
 	if (WARN_ON(nodes_empty(node_possible_map)))
 		return -EINVAL;