Merge tag 'libnvdimm-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Ross Zwisler:

 - Require struct page by default for filesystem DAX to remove a number
   of surprising failure cases. This includes failures with direct I/O,
   gdb and fork(2).

 - Add support for the new Platform Capabilities Structure added to the
   NFIT in ACPI 6.2a. This new table tells us whether the platform
   supports flushing of CPU and memory controller caches on unexpected
   power loss events.

 - Revamp vmem_altmap and dev_pagemap handling to clean up code and
   better support future future PCI P2P uses.

 - Deprecate the ND_IOCTL_SMART_THRESHOLD command whose payload has
   become out-of-sync with recent versions of the NVDIMM_FAMILY_INTEL
   spec, and instead rely on the generic ND_CMD_CALL approach used by
   the two other IOCTL families, NVDIMM_FAMILY_{HPE,MSFT}.

 - Enhance nfit_test so we can test some of the new things added in
   version 1.6 of the DSM specification. This includes testing firmware
   download and simulating the Last Shutdown State (LSS) status.

* tag 'libnvdimm-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (37 commits)
  libnvdimm, namespace: remove redundant initialization of 'nd_mapping'
  acpi, nfit: fix register dimm error handling
  libnvdimm, namespace: make min namespace size 4K
  tools/testing/nvdimm: force nfit_test to depend on instrumented modules
  libnvdimm/nfit_test: adding support for unit testing enable LSS status
  libnvdimm/nfit_test: add firmware download emulation
  nfit-test: Add platform cap support from ACPI 6.2a to test
  libnvdimm: expose platform persistence attribute for nd_region
  acpi: nfit: add persistent memory control flag for nd_region
  acpi: nfit: Add support for detect platform CPU cache flush on power loss
  device-dax: Fix trailing semicolon
  libnvdimm, btt: fix uninitialized err_lock
  dax: require 'struct page' by default for filesystem dax
  ext2: auto disable dax instead of failing mount
  ext4: auto disable dax instead of failing mount
  mm, dax: introduce pfn_t_special()
  mm: Fix devm_memremap_pages() collision handling
  mm: Fix memory size alignment in devm_memremap_pages_release()
  memremap: merge find_dev_pagemap into get_dev_pagemap
  memremap: change devm_memremap_pages interface to use struct dev_pagemap
  ...

7 files changed, 96 insertions, 95 deletions

diff --git a/mm/gup.c b/mm/gup.c
index 9e17d8db2d6b..1b46e6e74881 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1394,7 +1394,6 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
 
 		VM_BUG_ON_PAGE(compound_head(page) != head, page);
 
-		put_dev_pagemap(pgmap);
 		SetPageReferenced(page);
 		pages[*nr] = page;
 		(*nr)++;
@@ -1404,6 +1403,8 @@ static int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end,
 	ret = 1;
 
 pte_unmap:
+	if (pgmap)
+		put_dev_pagemap(pgmap);
 	pte_unmap(ptem);
 	return ret;
 }
@@ -1443,10 +1444,12 @@ static int __gup_device_huge(unsigned long pfn, unsigned long addr,
 		SetPageReferenced(page);
 		pages[*nr] = page;
 		get_page(page);
-		put_dev_pagemap(pgmap);
 		(*nr)++;
 		pfn++;
 	} while (addr += PAGE_SIZE, addr != end);
+
+	if (pgmap)
+		put_dev_pagemap(pgmap);
 	return 1;
 }
 
diff --git a/mm/hmm.c b/mm/hmm.c
index 979211c7ccc8..320545b98ff5 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -836,10 +836,10 @@ static void hmm_devmem_release(struct device *dev, void *data)
 
 	mem_hotplug_begin();
 	if (resource->desc == IORES_DESC_DEVICE_PRIVATE_MEMORY)
-		__remove_pages(zone, start_pfn, npages);
+		__remove_pages(zone, start_pfn, npages, NULL);
 	else
 		arch_remove_memory(start_pfn << PAGE_SHIFT,
-				   npages << PAGE_SHIFT);
+				   npages << PAGE_SHIFT, NULL);
 	mem_hotplug_done();
 
 	hmm_devmem_radix_release(resource);
@@ -880,7 +880,7 @@ static int hmm_devmem_pages_create(struct hmm_devmem *devmem)
 	else
 		devmem->pagemap.type = MEMORY_DEVICE_PRIVATE;
 
-	devmem->pagemap.res = devmem->resource;
+	devmem->pagemap.res = *devmem->resource;
 	devmem->pagemap.page_fault = hmm_devmem_fault;
 	devmem->pagemap.page_free = hmm_devmem_free;
 	devmem->pagemap.dev = devmem->device;
@@ -929,17 +929,18 @@ static int hmm_devmem_pages_create(struct hmm_devmem *devmem)
 	 * want the linear mapping and thus use arch_add_memory().
 	 */
 	if (devmem->pagemap.type == MEMORY_DEVICE_PUBLIC)
-		ret = arch_add_memory(nid, align_start, align_size, false);
+		ret = arch_add_memory(nid, align_start, align_size, NULL,
+				false);
 	else
 		ret = add_pages(nid, align_start >> PAGE_SHIFT,
-				align_size >> PAGE_SHIFT, false);
+				align_size >> PAGE_SHIFT, NULL, false);
 	if (ret) {
 		mem_hotplug_done();
 		goto error_add_memory;
 	}
 	move_pfn_range_to_zone(&NODE_DATA(nid)->node_zones[ZONE_DEVICE],
 				align_start >> PAGE_SHIFT,
-				align_size >> PAGE_SHIFT);
+				align_size >> PAGE_SHIFT, NULL);
 	mem_hotplug_done();
 
 	for (pfn = devmem->pfn_first; pfn < devmem->pfn_last; pfn++) {
diff --git a/mm/memory.c b/mm/memory.c
index 53373b7a1512..2248529e71c1 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1904,12 +1904,26 @@ int vm_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr,
 }
 EXPORT_SYMBOL(vm_insert_pfn_prot);
 
+static bool vm_mixed_ok(struct vm_area_struct *vma, pfn_t pfn)
+{
+	/* these checks mirror the abort conditions in vm_normal_page */
+	if (vma->vm_flags & VM_MIXEDMAP)
+		return true;
+	if (pfn_t_devmap(pfn))
+		return true;
+	if (pfn_t_special(pfn))
+		return true;
+	if (is_zero_pfn(pfn_t_to_pfn(pfn)))
+		return true;
+	return false;
+}
+
 static int __vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
 			pfn_t pfn, bool mkwrite)
 {
 	pgprot_t pgprot = vma->vm_page_prot;
 
-	BUG_ON(!(vma->vm_flags & VM_MIXEDMAP));
+	BUG_ON(!vm_mixed_ok(vma, pfn));
 
 	if (addr < vma->vm_start || addr >= vma->vm_end)
 		return -EFAULT;
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9bbd6982d4e4..b2bd52ff7605 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -247,7 +247,7 @@ void __init register_page_bootmem_info_node(struct pglist_data *pgdat)
 #endif /* CONFIG_HAVE_BOOTMEM_INFO_NODE */
 
 static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
-		bool want_memblock)
+		struct vmem_altmap *altmap, bool want_memblock)
 {
 	int ret;
 	int i;
@@ -255,7 +255,7 @@ static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
 	if (pfn_valid(phys_start_pfn))
 		return -EEXIST;
 
-	ret = sparse_add_one_section(NODE_DATA(nid), phys_start_pfn);
+	ret = sparse_add_one_section(NODE_DATA(nid), phys_start_pfn, altmap);
 	if (ret < 0)
 		return ret;
 
@@ -289,18 +289,17 @@ static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
  * add the new pages.
  */
 int __ref __add_pages(int nid, unsigned long phys_start_pfn,
-			unsigned long nr_pages, bool want_memblock)
+		unsigned long nr_pages, struct vmem_altmap *altmap,
+		bool want_memblock)
 {
 	unsigned long i;
 	int err = 0;
 	int start_sec, end_sec;
-	struct vmem_altmap *altmap;
 
 	/* during initialize mem_map, align hot-added range to section */
 	start_sec = pfn_to_section_nr(phys_start_pfn);
 	end_sec = pfn_to_section_nr(phys_start_pfn + nr_pages - 1);
 
-	altmap = to_vmem_altmap((unsigned long) pfn_to_page(phys_start_pfn));
 	if (altmap) {
 		/*
 		 * Validate altmap is within bounds of the total request
@@ -315,7 +314,8 @@ int __ref __add_pages(int nid, unsigned long phys_start_pfn,
 	}
 
 	for (i = start_sec; i <= end_sec; i++) {
-		err = __add_section(nid, section_nr_to_pfn(i), want_memblock);
+		err = __add_section(nid, section_nr_to_pfn(i), altmap,
+				want_memblock);
 
 		/*
 		 * EEXIST is finally dealt with by ioresource collision
@@ -331,7 +331,6 @@ int __ref __add_pages(int nid, unsigned long phys_start_pfn,
 out:
 	return err;
 }
-EXPORT_SYMBOL_GPL(__add_pages);
 
 #ifdef CONFIG_MEMORY_HOTREMOVE
 /* find the smallest valid pfn in the range [start_pfn, end_pfn) */
@@ -534,7 +533,7 @@ static void __remove_zone(struct zone *zone, unsigned long start_pfn)
 }
 
 static int __remove_section(struct zone *zone, struct mem_section *ms,
-		unsigned long map_offset)
+		unsigned long map_offset, struct vmem_altmap *altmap)
 {
 	unsigned long start_pfn;
 	int scn_nr;
@@ -551,7 +550,7 @@ static int __remove_section(struct zone *zone, struct mem_section *ms,
 	start_pfn = section_nr_to_pfn((unsigned long)scn_nr);
 	__remove_zone(zone, start_pfn);
 
-	sparse_remove_one_section(zone, ms, map_offset);
+	sparse_remove_one_section(zone, ms, map_offset, altmap);
 	return 0;
 }
 
@@ -567,7 +566,7 @@ static int __remove_section(struct zone *zone, struct mem_section *ms,
  * calling offline_pages().
  */
 int __remove_pages(struct zone *zone, unsigned long phys_start_pfn,
-		 unsigned long nr_pages)
+		 unsigned long nr_pages, struct vmem_altmap *altmap)
 {
 	unsigned long i;
 	unsigned long map_offset = 0;
@@ -575,10 +574,6 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn,
 
 	/* In the ZONE_DEVICE case device driver owns the memory region */
 	if (is_dev_zone(zone)) {
-		struct page *page = pfn_to_page(phys_start_pfn);
-		struct vmem_altmap *altmap;
-
-		altmap = to_vmem_altmap((unsigned long) page);
 		if (altmap)
 			map_offset = vmem_altmap_offset(altmap);
 	} else {
@@ -609,7 +604,8 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn,
 	for (i = 0; i < sections_to_remove; i++) {
 		unsigned long pfn = phys_start_pfn + i*PAGES_PER_SECTION;
 
-		ret = __remove_section(zone, __pfn_to_section(pfn), map_offset);
+		ret = __remove_section(zone, __pfn_to_section(pfn), map_offset,
+				altmap);
 		map_offset = 0;
 		if (ret)
 			break;
@@ -799,8 +795,8 @@ static void __meminit resize_pgdat_range(struct pglist_data *pgdat, unsigned lon
 	pgdat->node_spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - pgdat->node_start_pfn;
 }
 
-void __ref move_pfn_range_to_zone(struct zone *zone,
-		unsigned long start_pfn, unsigned long nr_pages)
+void __ref move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
+		unsigned long nr_pages, struct vmem_altmap *altmap)
 {
 	struct pglist_data *pgdat = zone->zone_pgdat;
 	int nid = pgdat->node_id;
@@ -825,7 +821,8 @@ void __ref move_pfn_range_to_zone(struct zone *zone,
 	 * expects the zone spans the pfn range. All the pages in the range
 	 * are reserved so nobody should be touching them so we should be safe
 	 */
-	memmap_init_zone(nr_pages, nid, zone_idx(zone), start_pfn, MEMMAP_HOTPLUG);
+	memmap_init_zone(nr_pages, nid, zone_idx(zone), start_pfn,
+			MEMMAP_HOTPLUG, altmap);
 
 	set_zone_contiguous(zone);
 }
@@ -897,7 +894,7 @@ static struct zone * __meminit move_pfn_range(int online_type, int nid,
 	struct zone *zone;
 
 	zone = zone_for_pfn_range(online_type, nid, start_pfn, nr_pages);
-	move_pfn_range_to_zone(zone, start_pfn, nr_pages);
+	move_pfn_range_to_zone(zone, start_pfn, nr_pages, NULL);
 	return zone;
 }
 
@@ -1146,7 +1143,7 @@ int __ref add_memory_resource(int nid, struct resource *res, bool online)
 	}
 
 	/* call arch's memory hotadd */
-	ret = arch_add_memory(nid, start, size, true);
+	ret = arch_add_memory(nid, start, size, NULL, true);
 
 	if (ret < 0)
 		goto error;
@@ -1888,7 +1885,7 @@ void __ref remove_memory(int nid, u64 start, u64 size)
 	memblock_free(start, size);
 	memblock_remove(start, size);
 
-	arch_remove_memory(start, size);
+	arch_remove_memory(start, size, NULL);
 
 	try_offline_node(nid);
 
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c7dd9c86e353..81e18ceef579 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5321,9 +5321,9 @@ void __ref build_all_zonelists(pg_data_t *pgdat)
  * done. Non-atomic initialization, single-pass.
  */
 void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
-		unsigned long start_pfn, enum memmap_context context)
+		unsigned long start_pfn, enum memmap_context context,
+		struct vmem_altmap *altmap)
 {
-	struct vmem_altmap *altmap = to_vmem_altmap(__pfn_to_phys(start_pfn));
 	unsigned long end_pfn = start_pfn + size;
 	pg_data_t *pgdat = NODE_DATA(nid);
 	unsigned long pfn;
@@ -5429,7 +5429,7 @@ static void __meminit zone_init_free_lists(struct zone *zone)
 
 #ifndef __HAVE_ARCH_MEMMAP_INIT
 #define memmap_init(size, nid, zone, start_pfn) \
-	memmap_init_zone((size), (nid), (zone), (start_pfn), MEMMAP_EARLY)
+	memmap_init_zone((size), (nid), (zone), (start_pfn), MEMMAP_EARLY, NULL)
 #endif
 
 static int zone_batchsize(struct zone *zone)
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index 17acf01791fa..bd0276d5f66b 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -74,7 +74,7 @@ void * __meminit vmemmap_alloc_block(unsigned long size, int node)
 }
 
 /* need to make sure size is all the same during early stage */
-static void * __meminit alloc_block_buf(unsigned long size, int node)
+void * __meminit vmemmap_alloc_block_buf(unsigned long size, int node)
 {
 	void *ptr;
 
@@ -107,33 +107,16 @@ static unsigned long __meminit vmem_altmap_nr_free(struct vmem_altmap *altmap)
 }
 
 /**
- * vmem_altmap_alloc - allocate pages from the vmem_altmap reservation
- * @altmap - reserved page pool for the allocation
- * @nr_pfns - size (in pages) of the allocation
+ * altmap_alloc_block_buf - allocate pages from the device page map
+ * @altmap:	device page map
+ * @size:	size (in bytes) of the allocation
  *
- * Allocations are aligned to the size of the request
+ * Allocations are aligned to the size of the request.
  */
-static unsigned long __meminit vmem_altmap_alloc(struct vmem_altmap *altmap,
-		unsigned long nr_pfns)
-{
-	unsigned long pfn = vmem_altmap_next_pfn(altmap);
-	unsigned long nr_align;
-
-	nr_align = 1UL << find_first_bit(&nr_pfns, BITS_PER_LONG);
-	nr_align = ALIGN(pfn, nr_align) - pfn;
-
-	if (nr_pfns + nr_align > vmem_altmap_nr_free(altmap))
-		return ULONG_MAX;
-	altmap->alloc += nr_pfns;
-	altmap->align += nr_align;
-	return pfn + nr_align;
-}
-
-static void * __meminit altmap_alloc_block_buf(unsigned long size,
+void * __meminit altmap_alloc_block_buf(unsigned long size,
 		struct vmem_altmap *altmap)
 {
-	unsigned long pfn, nr_pfns;
-	void *ptr;
+	unsigned long pfn, nr_pfns, nr_align;
 
 	if (size & ~PAGE_MASK) {
 		pr_warn_once("%s: allocations must be multiple of PAGE_SIZE (%ld)\n",
@@ -141,25 +124,20 @@ static void * __meminit altmap_alloc_block_buf(unsigned long size,
 		return NULL;
 	}
 
+	pfn = vmem_altmap_next_pfn(altmap);
 	nr_pfns = size >> PAGE_SHIFT;
-	pfn = vmem_altmap_alloc(altmap, nr_pfns);
-	if (pfn < ULONG_MAX)
-		ptr = __va(__pfn_to_phys(pfn));
-	else
-		ptr = NULL;
-	pr_debug("%s: pfn: %#lx alloc: %ld align: %ld nr: %#lx\n",
-			__func__, pfn, altmap->alloc, altmap->align, nr_pfns);
+	nr_align = 1UL << find_first_bit(&nr_pfns, BITS_PER_LONG);
+	nr_align = ALIGN(pfn, nr_align) - pfn;
+	if (nr_pfns + nr_align > vmem_altmap_nr_free(altmap))
+		return NULL;
 
-	return ptr;
-}
+	altmap->alloc += nr_pfns;
+	altmap->align += nr_align;
+	pfn += nr_align;
 
-/* need to make sure size is all the same during early stage */
-void * __meminit __vmemmap_alloc_block_buf(unsigned long size, int node,
-		struct vmem_altmap *altmap)
-{
-	if (altmap)
-		return altmap_alloc_block_buf(size, altmap);
-	return alloc_block_buf(size, node);
+	pr_debug("%s: pfn: %#lx alloc: %ld align: %ld nr: %#lx\n",
+			__func__, pfn, altmap->alloc, altmap->align, nr_pfns);
+	return __va(__pfn_to_phys(pfn));
 }
 
 void __meminit vmemmap_verify(pte_t *pte, int node,
@@ -178,7 +156,7 @@ pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node)
 	pte_t *pte = pte_offset_kernel(pmd, addr);
 	if (pte_none(*pte)) {
 		pte_t entry;
-		void *p = alloc_block_buf(PAGE_SIZE, node);
+		void *p = vmemmap_alloc_block_buf(PAGE_SIZE, node);
 		if (!p)
 			return NULL;
 		entry = pfn_pte(__pa(p) >> PAGE_SHIFT, PAGE_KERNEL);
@@ -278,7 +256,8 @@ int __meminit vmemmap_populate_basepages(unsigned long start,
 	return 0;
 }
 
-struct page * __meminit sparse_mem_map_populate(unsigned long pnum, int nid)
+struct page * __meminit sparse_mem_map_populate(unsigned long pnum, int nid,
+		struct vmem_altmap *altmap)
 {
 	unsigned long start;
 	unsigned long end;
@@ -288,7 +267,7 @@ struct page * __meminit sparse_mem_map_populate(unsigned long pnum, int nid)
 	start = (unsigned long)map;
 	end = (unsigned long)(map + PAGES_PER_SECTION);
 
-	if (vmemmap_populate(start, end, nid))
+	if (vmemmap_populate(start, end, nid, altmap))
 		return NULL;
 
 	return map;
@@ -318,7 +297,7 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
 		if (!present_section_nr(pnum))
 			continue;
 
-		map_map[pnum] = sparse_mem_map_populate(pnum, nodeid);
+		map_map[pnum] = sparse_mem_map_populate(pnum, nodeid, NULL);
 		if (map_map[pnum])
 			continue;
 		ms = __nr_to_section(pnum);
diff --git a/mm/sparse.c b/mm/sparse.c
index 6b8b5e91ceef..7af5e7a92528 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -421,7 +421,8 @@ static void __init sparse_early_usemaps_alloc_node(void *data,
 }
 
 #ifndef CONFIG_SPARSEMEM_VMEMMAP
-struct page __init *sparse_mem_map_populate(unsigned long pnum, int nid)
+struct page __init *sparse_mem_map_populate(unsigned long pnum, int nid,
+		struct vmem_altmap *altmap)
 {
 	struct page *map;
 	unsigned long size;
@@ -476,7 +477,7 @@ void __init sparse_mem_maps_populate_node(struct page **map_map,
 
 		if (!present_section_nr(pnum))
 			continue;
-		map_map[pnum] = sparse_mem_map_populate(pnum, nodeid);
+		map_map[pnum] = sparse_mem_map_populate(pnum, nodeid, NULL);
 		if (map_map[pnum])
 			continue;
 		ms = __nr_to_section(pnum);
@@ -504,7 +505,7 @@ static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
 	struct mem_section *ms = __nr_to_section(pnum);
 	int nid = sparse_early_nid(ms);
 
-	map = sparse_mem_map_populate(pnum, nid);
+	map = sparse_mem_map_populate(pnum, nid, NULL);
 	if (map)
 		return map;
 
@@ -682,17 +683,19 @@ void offline_mem_sections(unsigned long start_pfn, unsigned long end_pfn)
 #endif
 
 #ifdef CONFIG_SPARSEMEM_VMEMMAP
-static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid)
+static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid,
+		struct vmem_altmap *altmap)
 {
 	/* This will make the necessary allocations eventually. */
-	return sparse_mem_map_populate(pnum, nid);
+	return sparse_mem_map_populate(pnum, nid, altmap);
 }
-static void __kfree_section_memmap(struct page *memmap)
+static void __kfree_section_memmap(struct page *memmap,
+		struct vmem_altmap *altmap)
 {
 	unsigned long start = (unsigned long)memmap;
 	unsigned long end = (unsigned long)(memmap + PAGES_PER_SECTION);
 
-	vmemmap_free(start, end);
+	vmemmap_free(start, end, altmap);
 }
 #ifdef CONFIG_MEMORY_HOTREMOVE
 static void free_map_bootmem(struct page *memmap)
@@ -700,7 +703,7 @@ static void free_map_bootmem(struct page *memmap)
 	unsigned long start = (unsigned long)memmap;
 	unsigned long end = (unsigned long)(memmap + PAGES_PER_SECTION);
 
-	vmemmap_free(start, end);
+	vmemmap_free(start, end, NULL);
 }
 #endif /* CONFIG_MEMORY_HOTREMOVE */
 #else
@@ -725,12 +728,14 @@ got_map_ptr:
 	return ret;
 }
 
-static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid)
+static inline struct page *kmalloc_section_memmap(unsigned long pnum, int nid,
+		struct vmem_altmap *altmap)
 {
 	return __kmalloc_section_memmap();
 }
 
-static void __kfree_section_memmap(struct page *memmap)
+static void __kfree_section_memmap(struct page *memmap,
+		struct vmem_altmap *altmap)
 {
 	if (is_vmalloc_addr(memmap))
 		vfree(memmap);
@@ -777,7 +782,8 @@ static void free_map_bootmem(struct page *memmap)
  * set.  If this is <=0, then that means that the passed-in
  * map was not consumed and must be freed.
  */
-int __meminit sparse_add_one_section(struct pglist_data *pgdat, unsigned long start_pfn)
+int __meminit sparse_add_one_section(struct pglist_data *pgdat,
+		unsigned long start_pfn, struct vmem_altmap *altmap)
 {
 	unsigned long section_nr = pfn_to_section_nr(start_pfn);
 	struct mem_section *ms;
@@ -793,12 +799,12 @@ int __meminit sparse_add_one_section(struct pglist_data *pgdat, unsigned long st
 	ret = sparse_index_init(section_nr, pgdat->node_id);
 	if (ret < 0 && ret != -EEXIST)
 		return ret;
-	memmap = kmalloc_section_memmap(section_nr, pgdat->node_id);
+	memmap = kmalloc_section_memmap(section_nr, pgdat->node_id, altmap);
 	if (!memmap)
 		return -ENOMEM;
 	usemap = __kmalloc_section_usemap();
 	if (!usemap) {
-		__kfree_section_memmap(memmap);
+		__kfree_section_memmap(memmap, altmap);
 		return -ENOMEM;
 	}
 
@@ -820,7 +826,7 @@ out:
 	pgdat_resize_unlock(pgdat, &flags);
 	if (ret <= 0) {
 		kfree(usemap);
-		__kfree_section_memmap(memmap);
+		__kfree_section_memmap(memmap, altmap);
 	}
 	return ret;
 }
@@ -847,7 +853,8 @@ static inline void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
 }
 #endif
 
-static void free_section_usemap(struct page *memmap, unsigned long *usemap)
+static void free_section_usemap(struct page *memmap, unsigned long *usemap,
+		struct vmem_altmap *altmap)
 {
 	struct page *usemap_page;
 
@@ -861,7 +868,7 @@ static void free_section_usemap(struct page *memmap, unsigned long *usemap)
 	if (PageSlab(usemap_page) || PageCompound(usemap_page)) {
 		kfree(usemap);
 		if (memmap)
-			__kfree_section_memmap(memmap);
+			__kfree_section_memmap(memmap, altmap);
 		return;
 	}
 
@@ -875,7 +882,7 @@ static void free_section_usemap(struct page *memmap, unsigned long *usemap)
 }
 
 void sparse_remove_one_section(struct zone *zone, struct mem_section *ms,
-		unsigned long map_offset)
+		unsigned long map_offset, struct vmem_altmap *altmap)
 {
 	struct page *memmap = NULL;
 	unsigned long *usemap = NULL, flags;
@@ -893,7 +900,7 @@ void sparse_remove_one_section(struct zone *zone, struct mem_section *ms,
 
 	clear_hwpoisoned_pages(memmap + map_offset,
 			PAGES_PER_SECTION - map_offset);
-	free_section_usemap(memmap, usemap);
+	free_section_usemap(memmap, usemap, altmap);
 }
 #endif /* CONFIG_MEMORY_HOTREMOVE */
 #endif /* CONFIG_MEMORY_HOTPLUG */