Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:
 "A few misc subsystems and some of MM.

  175 patches.

  Subsystems affected by this patch series: ia64, kbuild, scripts, sh,
  ocfs2, kfifo, vfs, kernel/watchdog, and mm (slab-generic, slub,
  kmemleak, debug, pagecache, msync, gup, memremap, memcg, pagemap,
  mremap, dma, sparsemem, vmalloc, documentation, kasan, initialization,
  pagealloc, and memory-failure)"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (175 commits)
  mm/memory-failure: unnecessary amount of unmapping
  mm/mmzone.h: fix existing kernel-doc comments and link them to core-api
  mm: page_alloc: ignore init_on_free=1 for debug_pagealloc=1
  net: page_pool: use alloc_pages_bulk in refill code path
  net: page_pool: refactor dma_map into own function page_pool_dma_map
  SUNRPC: refresh rq_pages using a bulk page allocator
  SUNRPC: set rq_page_end differently
  mm/page_alloc: inline __rmqueue_pcplist
  mm/page_alloc: optimize code layout for __alloc_pages_bulk
  mm/page_alloc: add an array-based interface to the bulk page allocator
  mm/page_alloc: add a bulk page allocator
  mm/page_alloc: rename alloced to allocated
  mm/page_alloc: duplicate include linux/vmalloc.h
  mm, page_alloc: avoid page_to_pfn() in move_freepages()
  mm/Kconfig: remove default DISCONTIGMEM_MANUAL
  mm: page_alloc: dump migrate-failed pages
  mm/mempolicy: fix mpol_misplaced kernel-doc
  mm/mempolicy: rewrite alloc_pages_vma documentation
  mm/mempolicy: rewrite alloc_pages documentation
  mm/mempolicy: rename alloc_pages_current to alloc_pages
  ...

81 files changed, 319 insertions, 586 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index 5e8f6680d4bf..bf27159be4d9 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -829,6 +829,17 @@ config HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
 config HAVE_ARCH_HUGE_VMAP
 	bool
 
+#
+#  Archs that select this would be capable of PMD-sized vmaps (i.e.,
+#  arch_vmap_pmd_supported() returns true), and they must make no assumptions
+#  that vmalloc memory is mapped with PAGE_SIZE ptes. The VM_NO_HUGE_VMAP flag
+#  can be used to prohibit arch-specific allocations from using hugepages to
+#  help with this (e.g., modules may require it).
+#
+config HAVE_ARCH_HUGE_VMALLOC
+	depends on HAVE_ARCH_HUGE_VMAP
+	bool
+
 config ARCH_WANT_HUGE_PMD_SHARE
 	bool
 
diff --git a/arch/alpha/mm/init.c b/arch/alpha/mm/init.c
index 3c42b3147fd6..a97650a618f1 100644
--- a/arch/alpha/mm/init.c
+++ b/arch/alpha/mm/init.c
@@ -282,5 +282,4 @@ mem_init(void)
 	set_max_mapnr(max_low_pfn);
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
 	memblock_free_all();
-	mem_init_print_info(NULL);
 }
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index ce07e697916c..33832e36bdb7 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -194,7 +194,6 @@ void __init mem_init(void)
 {
 	memblock_free_all();
 	highmem_init();
-	mem_init_print_info(NULL);
 }
 
 #ifdef CONFIG_HIGHMEM
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e6e08d8a45fc..085c830d344b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -33,6 +33,7 @@ config ARM
 	select ARCH_SUPPORTS_ATOMIC_RMW
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_CMPXCHG_LOCKREF
+	select ARCH_USE_MEMTEST
 	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select ARCH_WANT_LD_ORPHAN_WARN
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index 2b85d175e999..d4edab51a77c 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -186,8 +186,6 @@ static inline pte_t pte_mkspecial(pte_t pte)
 
 #define pmd_write(pmd)		(pmd_isclear((pmd), L_PMD_SECT_RDONLY))
 #define pmd_dirty(pmd)		(pmd_isset((pmd), L_PMD_SECT_DIRTY))
-#define pud_page(pud)		pmd_page(__pmd(pud_val(pud)))
-#define pud_write(pud)		pmd_write(__pmd(pud_val(pud)))
 
 #define pmd_hugewillfault(pmd)	(!pmd_young(pmd) || !pmd_write(pmd))
 #define pmd_thp_or_huge(pmd)	(pmd_huge(pmd) || pmd_trans_huge(pmd))
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index c02f24400369..d63a5bb6bd0c 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -166,6 +166,9 @@ extern struct page *empty_zero_page;
 
 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 
+#define pud_page(pud)		pmd_page(__pmd(pud_val(pud)))
+#define pud_write(pud)		pmd_write(__pmd(pud_val(pud)))
+
 #define pmd_none(pmd)		(!pmd_val(pmd))
 
 static inline pte_t *pmd_page_vaddr(pmd_t pmd)
diff --git a/arch/arm/mm/copypage-v4mc.c b/arch/arm/mm/copypage-v4mc.c
index 44f7292ec27b..f1da3b439b96 100644
--- a/arch/arm/mm/copypage-v4mc.c
+++ b/arch/arm/mm/copypage-v4mc.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 
 #include <asm/tlbflush.h>
 #include <asm/cacheflush.h>
diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c
index 6a769a6c314e..d8a115de5507 100644
--- a/arch/arm/mm/copypage-v6.c
+++ b/arch/arm/mm/copypage-v6.c
@@ -8,6 +8,7 @@
 #include <linux/spinlock.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 
 #include <asm/shmparam.h>
 #include <asm/tlbflush.h>
diff --git a/arch/arm/mm/copypage-xscale.c b/arch/arm/mm/copypage-xscale.c
index eb5d338657d1..bcb485620a05 100644
--- a/arch/arm/mm/copypage-xscale.c
+++ b/arch/arm/mm/copypage-xscale.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 
 #include <asm/tlbflush.h>
 #include <asm/cacheflush.h>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 828a2561b229..7022b7b5c400 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -316,8 +316,6 @@ void __init mem_init(void)
 
 	free_highpages();
 
-	mem_init_print_info(NULL);
-
 	/*
 	 * Check boundaries twice: Some fundamental inconsistencies can
 	 * be detected at build time already.
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 570fa52eb6f0..7f2a80091337 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -67,6 +67,7 @@ config ARM64
 	select ARCH_KEEP_MEMBLOCK
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select ARCH_USE_GNU_PROPERTY
+	select ARCH_USE_MEMTEST
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_USE_SYM_ANNOTATIONS
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index e6c7417bfb92..6d9915d066fa 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -250,8 +250,8 @@ static inline const void *__tag_set(const void *addr, u8 tag)
 #define arch_init_tags(max_tag)			mte_init_tags(max_tag)
 #define arch_get_random_tag()			mte_get_random_tag()
 #define arch_get_mem_tag(addr)			mte_get_mem_tag(addr)
-#define arch_set_mem_tag_range(addr, size, tag)	\
-			mte_set_mem_tag_range((addr), (size), (tag))
+#define arch_set_mem_tag_range(addr, size, tag, init)	\
+			mte_set_mem_tag_range((addr), (size), (tag), (init))
 #endif /* CONFIG_KASAN_HW_TAGS */
 
 /*
diff --git a/arch/arm64/include/asm/mte-kasan.h b/arch/arm64/include/asm/mte-kasan.h
index 4acf8bf41cad..ddd4d17cf9a0 100644
--- a/arch/arm64/include/asm/mte-kasan.h
+++ b/arch/arm64/include/asm/mte-kasan.h
@@ -53,7 +53,8 @@ static inline u8 mte_get_random_tag(void)
  * Note: The address must be non-NULL and MTE_GRANULE_SIZE aligned and
  * size must be non-zero and MTE_GRANULE_SIZE aligned.
  */
-static inline void mte_set_mem_tag_range(void *addr, size_t size, u8 tag)
+static inline void mte_set_mem_tag_range(void *addr, size_t size,
+						u8 tag, bool init)
 {
 	u64 curr, end;
 
@@ -63,18 +64,27 @@ static inline void mte_set_mem_tag_range(void *addr, size_t size, u8 tag)
 	curr = (u64)__tag_set(addr, tag);
 	end = curr + size;
 
-	do {
-		/*
-		 * 'asm volatile' is required to prevent the compiler to move
-		 * the statement outside of the loop.
-		 */
-		asm volatile(__MTE_PREAMBLE "stg %0, [%0]"
-			     :
-			     : "r" (curr)
-			     : "memory");
-
-		curr += MTE_GRANULE_SIZE;
-	} while (curr != end);
+	/*
+	 * 'asm volatile' is required to prevent the compiler to move
+	 * the statement outside of the loop.
+	 */
+	if (init) {
+		do {
+			asm volatile(__MTE_PREAMBLE "stzg %0, [%0]"
+				     :
+				     : "r" (curr)
+				     : "memory");
+			curr += MTE_GRANULE_SIZE;
+		} while (curr != end);
+	} else {
+		do {
+			asm volatile(__MTE_PREAMBLE "stg %0, [%0]"
+				     :
+				     : "r" (curr)
+				     : "memory");
+			curr += MTE_GRANULE_SIZE;
+		} while (curr != end);
+	}
 }
 
 void mte_enable_kernel_sync(void);
@@ -101,7 +111,8 @@ static inline u8 mte_get_random_tag(void)
 	return 0xFF;
 }
 
-static inline void mte_set_mem_tag_range(void *addr, size_t size, u8 tag)
+static inline void mte_set_mem_tag_range(void *addr, size_t size,
+						u8 tag, bool init)
 {
 }
 
diff --git a/arch/arm64/include/asm/vmalloc.h b/arch/arm64/include/asm/vmalloc.h
index 2ca708ab9b20..7a22aeea9bb5 100644
--- a/arch/arm64/include/asm/vmalloc.h
+++ b/arch/arm64/include/asm/vmalloc.h
@@ -1,4 +1,28 @@
 #ifndef _ASM_ARM64_VMALLOC_H
 #define _ASM_ARM64_VMALLOC_H
 
+#include <asm/page.h>
+
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+
+#define arch_vmap_pud_supported arch_vmap_pud_supported
+static inline bool arch_vmap_pud_supported(pgprot_t prot)
+{
+	/*
+	 * Only 4k granule supports level 1 block mappings.
+	 * SW table walks can't handle removal of intermediate entries.
+	 */
+	return IS_ENABLED(CONFIG_ARM64_4K_PAGES) &&
+	       !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
+}
+
+#define arch_vmap_pmd_supported arch_vmap_pmd_supported
+static inline bool arch_vmap_pmd_supported(pgprot_t prot)
+{
+	/* See arch_vmap_pud_supported() */
+	return !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
+}
+
+#endif
+
 #endif /* _ASM_ARM64_VMALLOC_H */
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 3685e12aba9b..ef031511ce29 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -491,8 +491,6 @@ void __init mem_init(void)
 	/* this will put all unused low memory onto the freelists */
 	memblock_free_all();
 
-	mem_init_print_info(NULL);
-
 	/*
 	 * Check boundaries twice: Some fundamental inconsistencies can be
 	 * detected at build time already.
@@ -521,7 +519,7 @@ void free_initmem(void)
 	 * prevents the region from being reused for kernel modules, which
 	 * is not supported by kallsyms.
 	 */
-	unmap_kernel_range((u64)__init_begin, (u64)(__init_end - __init_begin));
+	vunmap_range((u64)__init_begin, (u64)__init_end);
 }
 
 void dump_mem_limit(void)
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index d563335ad43f..70fa3cdbe841 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -1339,27 +1339,6 @@ void *__init fixmap_remap_fdt(phys_addr_t dt_phys, int *size, pgprot_t prot)
 	return dt_virt;
 }
 
-int __init arch_ioremap_p4d_supported(void)
-{
-	return 0;
-}
-
-int __init arch_ioremap_pud_supported(void)
-{
-	/*
-	 * Only 4k granule supports level 1 block mappings.
-	 * SW table walks can't handle removal of intermediate entries.
-	 */
-	return IS_ENABLED(CONFIG_ARM64_4K_PAGES) &&
-	       !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
-}
-
-int __init arch_ioremap_pmd_supported(void)
-{
-	/* See arch_ioremap_pud_supported() */
-	return !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
-}
-
 int pud_set_huge(pud_t *pudp, phys_addr_t phys, pgprot_t prot)
 {
 	pud_t new_pud = pfn_pud(__phys_to_pfn(phys), mk_pud_sect_prot(prot));
@@ -1451,11 +1430,6 @@ int pud_free_pmd_page(pud_t *pudp, unsigned long addr)
 	return 1;
 }
 
-int p4d_free_pud_page(p4d_t *p4d, unsigned long addr)
-{
-	return 0;	/* Don't attempt a block mapping */
-}
-
 #ifdef CONFIG_MEMORY_HOTPLUG
 static void __remove_pgd_mapping(pgd_t *pgdir, unsigned long start, u64 size)
 {
diff --git a/arch/csky/abiv1/cacheflush.c b/arch/csky/abiv1/cacheflush.c
index 9f1fe80cc847..07ff17ea33de 100644
--- a/arch/csky/abiv1/cacheflush.c
+++ b/arch/csky/abiv1/cacheflush.c
@@ -4,6 +4,7 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
+#include <linux/pagemap.h>
 #include <linux/syscalls.h>
 #include <linux/spinlock.h>
 #include <asm/page.h>
diff --git a/arch/csky/mm/init.c b/arch/csky/mm/init.c
index 894050a8ce09..bf2004aa811a 100644
--- a/arch/csky/mm/init.c
+++ b/arch/csky/mm/init.c
@@ -107,7 +107,6 @@ void __init mem_init(void)
 			free_highmem_page(page);
 	}
 #endif
-	mem_init_print_info(NULL);
 }
 
 void free_initmem(void)
diff --git a/arch/h8300/mm/init.c b/arch/h8300/mm/init.c
index 1f3b345d68b9..f7bf4693e3b2 100644
--- a/arch/h8300/mm/init.c
+++ b/arch/h8300/mm/init.c
@@ -98,6 +98,4 @@ void __init mem_init(void)
 
 	/* this will put all low memory onto the freelists */
 	memblock_free_all();
-
-	mem_init_print_info(NULL);
 }
diff --git a/arch/hexagon/mm/init.c b/arch/hexagon/mm/init.c
index f2e6c868e477..f01e91e10d95 100644
--- a/arch/hexagon/mm/init.c
+++ b/arch/hexagon/mm/init.c
@@ -55,7 +55,6 @@ void __init mem_init(void)
 {
 	/*  No idea where this is actually declared.  Seems to evade LXR.  */
 	memblock_free_all();
-	mem_init_print_info(NULL);
 
 	/*
 	 *  To-Do:  someone somewhere should wipe out the bootmem map
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 2ad7a8d29fcc..81e2b893b1e7 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -286,15 +286,6 @@ config FORCE_CPEI_RETARGET
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y
 
-config ARCH_DISCONTIGMEM_ENABLE
-	def_bool y
-	depends on BROKEN
-	help
-	  Say Y to support efficient handling of discontiguous physical memory,
-	  for architectures which are either NUMA (Non-Uniform Memory Access)
-	  or have huge holes in the physical address space for other reasons.
-	  See <file:Documentation/vm/numa.rst> for more.
-
 config ARCH_FLATMEM_ENABLE
 	def_bool y
 
@@ -325,22 +316,8 @@ config NODES_SHIFT
 	  MAX_NUMNODES will be 2^(This value).
 	  If in doubt, use the default.
 
-# VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
-# VIRTUAL_MEM_MAP has been retained for historical reasons.
-config VIRTUAL_MEM_MAP
-	bool "Virtual mem map"
-	depends on !SPARSEMEM && !FLATMEM
-	default y
-	help
-	  Say Y to compile the kernel with support for a virtual mem map.
-	  This code also only takes effect if a memory hole of greater than
-	  1 Gb is found during boot.  You must turn this option on if you
-	  require the DISCONTIGMEM option for your machine. If you are
-	  unsure, say Y.
-
 config HOLES_IN_ZONE
 	bool
-	default y if VIRTUAL_MEM_MAP
 
 config HAVE_ARCH_NODEDATA_EXTENSION
 	def_bool y
diff --git a/arch/ia64/configs/bigsur_defconfig b/arch/ia64/configs/bigsur_defconfig
index c409756b5396..0341a67cc1bf 100644
--- a/arch/ia64/configs/bigsur_defconfig
+++ b/arch/ia64/configs/bigsur_defconfig
@@ -9,7 +9,6 @@ CONFIG_SGI_PARTITION=y
 CONFIG_SMP=y
 CONFIG_NR_CPUS=2
 CONFIG_PREEMPT=y
-# CONFIG_VIRTUAL_MEM_MAP is not set
 CONFIG_IA64_PALINFO=y
 CONFIG_EFI_VARS=y
 CONFIG_BINFMT_MISC=m
diff --git a/arch/ia64/include/asm/meminit.h b/arch/ia64/include/asm/meminit.h
index e789c0818edb..6c47a239fc26 100644
--- a/arch/ia64/include/asm/meminit.h
+++ b/arch/ia64/include/asm/meminit.h
@@ -58,15 +58,4 @@ extern int reserve_elfcorehdr(u64 *start, u64 *end);
 
 extern int register_active_ranges(u64 start, u64 len, int nid);
 
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-  extern unsigned long VMALLOC_END;
-  extern struct page *vmem_map;
-  extern int create_mem_map_page_table(u64 start, u64 end, void *arg);
-  extern int vmemmap_find_next_valid_pfn(int, int);
-#else
-static inline int vmemmap_find_next_valid_pfn(int node, int i)
-{
-	return i + 1;
-}
-#endif
 #endif /* meminit_h */
diff --git a/arch/ia64/include/asm/module.h b/arch/ia64/include/asm/module.h
index 5a29652e6def..7271b9c5fc76 100644
--- a/arch/ia64/include/asm/module.h
+++ b/arch/ia64/include/asm/module.h
@@ -14,16 +14,20 @@
 struct elf64_shdr;			/* forward declration */
 
 struct mod_arch_specific {
+	/* Used only at module load time. */
 	struct elf64_shdr *core_plt;	/* core PLT section */
 	struct elf64_shdr *init_plt;	/* init PLT section */
 	struct elf64_shdr *got;		/* global offset table */
 	struct elf64_shdr *opd;		/* official procedure descriptors */
 	struct elf64_shdr *unwind;	/* unwind-table section */
 	unsigned long gp;		/* global-pointer for module */
+	unsigned int next_got_entry;	/* index of next available got entry */
 
+	/* Used at module run and cleanup time. */
 	void *core_unw_table;		/* core unwind-table cookie returned by unwinder */
 	void *init_unw_table;		/* init unwind-table cookie returned by unwinder */
-	unsigned int next_got_entry;	/* index of next available got entry */
+	void *opd_addr;			/* symbolize uses .opd to get to actual function */
+	unsigned long opd_size;
 };
 
 #define ARCH_SHF_SMALL	SHF_IA_64_SHORT
diff --git a/arch/ia64/include/asm/page.h b/arch/ia64/include/asm/page.h
index b69a5499d75b..f4dc81fa7146 100644
--- a/arch/ia64/include/asm/page.h
+++ b/arch/ia64/include/asm/page.h
@@ -95,31 +95,10 @@ do {						\
 
 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
 
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-extern int ia64_pfn_valid (unsigned long pfn);
-#else
-# define ia64_pfn_valid(pfn) 1
-#endif
-
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-extern struct page *vmem_map;
-#ifdef CONFIG_DISCONTIGMEM
-# define page_to_pfn(page)	((unsigned long) (page - vmem_map))
-# define pfn_to_page(pfn)	(vmem_map + (pfn))
-# define __pfn_to_phys(pfn)	PFN_PHYS(pfn)
-#else
-# include <asm-generic/memory_model.h>
-#endif
-#else
-# include <asm-generic/memory_model.h>
-#endif
+#include <asm-generic/memory_model.h>
 
 #ifdef CONFIG_FLATMEM
-# define pfn_valid(pfn)		(((pfn) < max_mapnr) && ia64_pfn_valid(pfn))
-#elif defined(CONFIG_DISCONTIGMEM)
-extern unsigned long min_low_pfn;
-extern unsigned long max_low_pfn;
-# define pfn_valid(pfn)		(((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn) && ia64_pfn_valid(pfn))
+# define pfn_valid(pfn)		((pfn) < max_mapnr)
 #endif
 
 #define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
diff --git a/arch/ia64/include/asm/pgtable.h b/arch/ia64/include/asm/pgtable.h
index 9b4efe89e62d..d765fd948fae 100644
--- a/arch/ia64/include/asm/pgtable.h
+++ b/arch/ia64/include/asm/pgtable.h
@@ -223,10 +223,6 @@ ia64_phys_addr_valid (unsigned long addr)
 
 
 #define VMALLOC_START		(RGN_BASE(RGN_GATE) + 0x200000000UL)
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-# define VMALLOC_END_INIT	(RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 9)))
-extern unsigned long VMALLOC_END;
-#else
 #if defined(CONFIG_SPARSEMEM) && defined(CONFIG_SPARSEMEM_VMEMMAP)
 /* SPARSEMEM_VMEMMAP uses half of vmalloc... */
 # define VMALLOC_END		(RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 10)))
@@ -234,7 +230,6 @@ extern unsigned long VMALLOC_END;
 #else
 # define VMALLOC_END		(RGN_BASE(RGN_GATE) + (1UL << (4*PAGE_SHIFT - 9)))
 #endif
-#endif
 
 /* fs/proc/kcore.c */
 #define	kc_vaddr_to_offset(v) ((v) - RGN_BASE(RGN_GATE))
@@ -328,7 +323,7 @@ extern void __ia64_sync_icache_dcache(pte_t pteval);
 static inline void set_pte(pte_t *ptep, pte_t pteval)
 {
 	/* page is present && page is user  && page is executable
-	 * && (page swapin or new page or page migraton
+	 * && (page swapin or new page or page migration
 	 *	|| copy_on_write with page copying.)
 	 */
 	if (pte_present_exec_user(pteval) &&
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index 78717819131c..08d4a2ba0652 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -9,7 +9,7 @@ endif
 
 extra-y	:= head.o vmlinux.lds
 
-obj-y := entry.o efi.o efi_stub.o gate-data.o fsys.o ia64_ksyms.o irq.o irq_ia64.o	\
+obj-y := entry.o efi.o efi_stub.o gate-data.o fsys.o irq.o irq_ia64.o	\
 	 irq_lsapic.o ivt.o pal.o patch.o process.o ptrace.o sal.o		\
 	 salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
 	 unwind.o mca.o mca_asm.o topology.o dma-mapping.o iosapic.o acpi.o \
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index a5636524af76..e2af6b172200 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -446,7 +446,8 @@ void __init acpi_numa_fixup(void)
 	if (srat_num_cpus == 0) {
 		node_set_online(0);
 		node_cpuid[0].phys_id = hard_smp_processor_id();
-		return;
+		slit_distance(0, 0) = LOCAL_DISTANCE;
+		goto out;
 	}
 
 	/*
@@ -489,7 +490,7 @@ void __init acpi_numa_fixup(void)
 			for (j = 0; j < MAX_NUMNODES; j++)
 				slit_distance(i, j) = i == j ?
 					LOCAL_DISTANCE : REMOTE_DISTANCE;
-		return;
+		goto out;
 	}
 
 	memset(numa_slit, -1, sizeof(numa_slit));
@@ -514,6 +515,8 @@ void __init acpi_numa_fixup(void)
 		printk("\n");
 	}
 #endif
+out:
+	node_possible_map = node_online_map;
 }
 #endif				/* CONFIG_ACPI_NUMA */
 
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index c5fe21de46a8..31149e41f9be 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -415,10 +415,10 @@ efi_get_pal_addr (void)
 		mask  = ~((1 << IA64_GRANULE_SHIFT) - 1);
 
 		printk(KERN_INFO "CPU %d: mapping PAL code "
-                       "[0x%lx-0x%lx) into [0x%lx-0x%lx)\n",
-                       smp_processor_id(), md->phys_addr,
-                       md->phys_addr + efi_md_size(md),
-                       vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
+			"[0x%llx-0x%llx) into [0x%llx-0x%llx)\n",
+			smp_processor_id(), md->phys_addr,
+			md->phys_addr + efi_md_size(md),
+			vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
 #endif
 		return __va(md->phys_addr);
 	}
@@ -560,6 +560,7 @@ efi_init (void)
 	{
 		efi_memory_desc_t *md;
 		void *p;
+		unsigned int i;
 
 		for (i = 0, p = efi_map_start; p < efi_map_end;
 		     ++i, p += efi_desc_size)
@@ -586,7 +587,7 @@ efi_init (void)
 			}
 
 			printk("mem%02d: %s "
-			       "range=[0x%016lx-0x%016lx) (%4lu%s)\n",
+			       "range=[0x%016llx-0x%016llx) (%4lu%s)\n",
 			       i, efi_md_typeattr_format(buf, sizeof(buf), md),
 			       md->phys_addr,
 			       md->phys_addr + efi_md_size(md), size, unit);
diff --git a/arch/ia64/kernel/fsys.S b/arch/ia64/kernel/fsys.S
index 0750a716adc7..2094f3249019 100644
--- a/arch/ia64/kernel/fsys.S
+++ b/arch/ia64/kernel/fsys.S
@@ -172,7 +172,7 @@ ENTRY(fsys_gettimeofday)
 	// r25 = itc_lastcycle value
 	// r26 = address clocksource cycle_last
 	// r27 = (not used)
-	// r28 = sequence number at the beginning of critcal section
+	// r28 = sequence number at the beginning of critical section
 	// r29 = address of itc_jitter
 	// r30 = time processing flags / memory address
 	// r31 = pointer to result
@@ -432,7 +432,7 @@ GLOBAL_ENTRY(fsys_bubble_down)
 	 *	- r29: psr
 	 *
 	 * We used to clear some PSR bits here but that requires slow
-	 * serialization.  Fortuntely, that isn't really necessary.
+	 * serialization.  Fortunately, that isn't really necessary.
 	 * The rationale is as follows: we used to clear bits
 	 * ~PSR_PRESERVED_BITS in PSR.L.  Since
 	 * PSR_PRESERVED_BITS==PSR.{UP,MFL,MFH,PK,DT,PP,SP,RT,IC}, we
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index 30f1ef760136..f22469f1c1fc 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -33,7 +33,6 @@
 #include <asm/mca_asm.h>
 #include <linux/init.h>
 #include <linux/linkage.h>
-#include <linux/pgtable.h>
 #include <asm/export.h>
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -405,11 +404,6 @@ start_ap:
 
 	// This is executed by the bootstrap processor (bsp) only:
 
-#ifdef CONFIG_IA64_FW_EMU
-	// initialize PAL & SAL emulator:
-	br.call.sptk.many rp=sys_fw_init
-.ret1:
-#endif
 	br.call.sptk.many rp=start_kernel
 .ret2:	addl r3=@ltoff(halt_msg),gp
 	;;
diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
deleted file mode 100644
index f8150ee74f29..000000000000
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ /dev/null
@@ -1,12 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Architecture-specific kernel symbols
- */
-
-#if defined(CONFIG_VIRTUAL_MEM_MAP) || defined(CONFIG_DISCONTIGMEM)
-#include <linux/compiler.h>
-#include <linux/export.h>
-#include <linux/memblock.h>
-EXPORT_SYMBOL(min_low_pfn);	/* defined by bootmem.c, but not exported by generic code */
-EXPORT_SYMBOL(max_low_pfn);	/* defined by bootmem.c, but not exported by generic code */
-#endif
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
index af310dc8a356..4db9ca144fa5 100644
--- a/arch/ia64/kernel/machine_kexec.c
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -143,7 +143,7 @@ void machine_kexec(struct kimage *image)
 
 void arch_crash_save_vmcoreinfo(void)
 {
-#if defined(CONFIG_DISCONTIGMEM) || defined(CONFIG_SPARSEMEM)
+#if defined(CONFIG_SPARSEMEM)
 	VMCOREINFO_SYMBOL(pgdat_list);
 	VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES);
 #endif
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index adf6521525f4..cdbac4b52f30 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -109,9 +109,9 @@
 #include "irq.h"
 
 #if defined(IA64_MCA_DEBUG_INFO)
-# define IA64_MCA_DEBUG(fmt...)	printk(fmt)
+# define IA64_MCA_DEBUG(fmt...) printk(fmt)
 #else
-# define IA64_MCA_DEBUG(fmt...)
+# define IA64_MCA_DEBUG(fmt...) do {} while (0)
 #endif
 
 #define NOTIFY_INIT(event, regs, arg, spin)				\
diff --git a/arch/ia64/kernel/module.c b/arch/ia64/kernel/module.c
index 00a496cb346f..2cba53c1da82 100644
--- a/arch/ia64/kernel/module.c
+++ b/arch/ia64/kernel/module.c
@@ -905,9 +905,31 @@ register_unwind_table (struct module *mod)
 int
 module_finalize (const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *mod)
 {
+	struct mod_arch_specific *mas = &mod->arch;
+
 	DEBUGP("%s: init: entry=%p\n", __func__, mod->init);
-	if (mod->arch.unwind)
+	if (mas->unwind)
 		register_unwind_table(mod);
+
+	/*
+	 * ".opd" was already relocated to the final destination. Store
+	 * it's address for use in symbolizer.
+	 */
+	mas->opd_addr = (void *)mas->opd->sh_addr;
+	mas->opd_size = mas->opd->sh_size;
+
+	/*
+	 * Module relocation was already done at this point. Section
+	 * headers are about to be deleted. Wipe out load-time context.
+	 */
+	mas->core_plt = NULL;
+	mas->init_plt = NULL;
+	mas->got = NULL;
+	mas->opd = NULL;
+	mas->unwind = NULL;
+	mas->gp = 0;
+	mas->next_got_entry = 0;
+
 	return 0;
 }
 
@@ -926,10 +948,9 @@ module_arch_cleanup (struct module *mod)
 
 void *dereference_module_function_descriptor(struct module *mod, void *ptr)
 {
-	Elf64_Shdr *opd = mod->arch.opd;
+	struct mod_arch_specific *mas = &mod->arch;
 
-	if (ptr < (void *)opd->sh_addr ||
-			ptr >= (void *)(opd->sh_addr + opd->sh_size))
+	if (ptr < mas->opd_addr || ptr >= mas->opd_addr + mas->opd_size)
 		return ptr;
 
 	return dereference_function_descriptor(ptr);
diff --git a/arch/ia64/kernel/pal.S b/arch/ia64/kernel/pal.S
index d3e22c018b68..06d01a070aae 100644
--- a/arch/ia64/kernel/pal.S
+++ b/arch/ia64/kernel/pal.S
@@ -86,7 +86,7 @@ GLOBAL_ENTRY(ia64_pal_call_static)
 	mov ar.pfs = loc1
 	mov rp = loc0
 	;;
-	srlz.d				// seralize restoration of psr.l
+	srlz.d				// serialize restoration of psr.l
 	br.ret.sptk.many b0
 END(ia64_pal_call_static)
 EXPORT_SYMBOL(ia64_pal_call_static)
@@ -194,7 +194,7 @@ GLOBAL_ENTRY(ia64_pal_call_phys_static)
 	mov rp = loc0
 	;;
 	mov ar.rsc=loc4			// restore RSE configuration
-	srlz.d				// seralize restoration of psr.l
+	srlz.d				// serialize restoration of psr.l
 	br.ret.sptk.many b0
 END(ia64_pal_call_phys_static)
 EXPORT_SYMBOL(ia64_pal_call_phys_static)
@@ -252,7 +252,7 @@ GLOBAL_ENTRY(ia64_pal_call_phys_stacked)
 	mov rp = loc0
 	;;
 	mov ar.rsc=loc4			// restore RSE configuration
-	srlz.d				// seralize restoration of psr.l
+	srlz.d				// serialize restoration of psr.l
 	br.ret.sptk.many b0
 END(ia64_pal_call_phys_stacked)
 EXPORT_SYMBOL(ia64_pal_call_phys_stacked)
diff --git a/arch/ia64/mm/Makefile b/arch/ia64/mm/Makefile
index 99a35039b548..c03f63c62ac4 100644
--- a/arch/ia64/mm/Makefile
+++ b/arch/ia64/mm/Makefile
@@ -7,6 +7,5 @@ obj-y := init.o fault.o tlb.o extable.o ioremap.o
 
 obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
 obj-$(CONFIG_NUMA)	   += numa.o
-obj-$(CONFIG_DISCONTIGMEM) += discontig.o
 obj-$(CONFIG_SPARSEMEM)	   += discontig.o
 obj-$(CONFIG_FLATMEM)	   += contig.o
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 62fe80a16f42..42e025cfbd08 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -153,11 +153,7 @@ find_memory (void)
 	efi_memmap_walk(find_max_min_low_pfn, NULL);
 	max_pfn = max_low_pfn;
 
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-	efi_memmap_walk(filter_memory, register_active_ranges);
-#else
 	memblock_add_node(0, PFN_PHYS(max_low_pfn), 0);
-#endif
 
 	find_initrd();
 
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index c310b4c99fb3..791d4176e4a6 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -585,25 +585,6 @@ void call_pernode_memory(unsigned long start, unsigned long len, void *arg)
 	}
 }
 
-static void __init virtual_map_init(void)
-{
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-	int node;
-
-	VMALLOC_END -= PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) *
-		sizeof(struct page));
-	vmem_map = (struct page *) VMALLOC_END;
-	efi_memmap_walk(create_mem_map_page_table, NULL);
-	printk("Virtual mem_map starts at 0x%p\n", vmem_map);
-
-	for_each_online_node(node) {
-		unsigned long pfn_offset = mem_data[node].min_pfn;
-
-		NODE_DATA(node)->node_mem_map = vmem_map + pfn_offset;
-	}
-#endif
-}
-
 /**
  * paging_init - setup page tables
  *
@@ -619,8 +600,6 @@ void __init paging_init(void)
 
 	sparse_init();
 
-	virtual_map_init();
-
 	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 	max_zone_pfns[ZONE_DMA32] = max_dma;
 	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index cd9766d2b6e0..02de2e70c587 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -84,18 +84,6 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
 	if (faulthandler_disabled() || !mm)
 		goto no_context;
 
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-	/*
-	 * If fault is in region 5 and we are in the kernel, we may already
-	 * have the mmap_lock (pfn_valid macro is called during mmap). There
-	 * is no vma for region 5 addr's anyway, so skip getting the semaphore
-	 * and go directly to the exception handling code.
-	 */
-
-	if ((REGION_NUMBER(address) == 5) && !user_mode(regs))
-		goto bad_area_no_up;
-#endif
-
 	/*
 	 * This is to handle the kprobes on user space access instructions
 	 */
@@ -213,9 +201,6 @@ retry:
 
   bad_area:
 	mmap_read_unlock(mm);
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-  bad_area_no_up:
-#endif
 	if ((isr & IA64_ISR_SP)
 	    || ((isr & IA64_ISR_NA) && (isr & IA64_ISR_CODE_MASK) == IA64_ISR_CODE_LFETCH))
 	{
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 16d0d7d22657..064a967a7b6e 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -43,13 +43,6 @@ extern void ia64_tlb_init (void);
 
 unsigned long MAX_DMA_ADDRESS = PAGE_OFFSET + 0x100000000UL;
 
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-unsigned long VMALLOC_END = VMALLOC_END_INIT;
-EXPORT_SYMBOL(VMALLOC_END);
-struct page *vmem_map;
-EXPORT_SYMBOL(vmem_map);
-#endif
-
 struct page *zero_page_memmap_ptr;	/* map entry for zero page */
 EXPORT_SYMBOL(zero_page_memmap_ptr);
 
@@ -373,212 +366,6 @@ void ia64_mmu_init(void *my_cpu_data)
 #endif
 }
 
-#ifdef CONFIG_VIRTUAL_MEM_MAP
-int vmemmap_find_next_valid_pfn(int node, int i)
-{
-	unsigned long end_address, hole_next_pfn;
-	unsigned long stop_address;
-	pg_data_t *pgdat = NODE_DATA(node);
-
-	end_address = (unsigned long) &vmem_map[pgdat->node_start_pfn + i];
-	end_address = PAGE_ALIGN(end_address);
-	stop_address = (unsigned long) &vmem_map[pgdat_end_pfn(pgdat)];
-
-	do {
-		pgd_t *pgd;
-		p4d_t *p4d;
-		pud_t *pud;
-		pmd_t *pmd;
-		pte_t *pte;
-
-		pgd = pgd_offset_k(end_address);
-		if (pgd_none(*pgd)) {
-			end_address += PGDIR_SIZE;
-			continue;
-		}
-
-		p4d = p4d_offset(pgd, end_address);
-		if (p4d_none(*p4d)) {
-			end_address += P4D_SIZE;
-			continue;
-		}
-
-		pud = pud_offset(p4d, end_address);
-		if (pud_none(*pud)) {
-			end_address += PUD_SIZE;
-			continue;
-		}
-
-		pmd = pmd_offset(pud, end_address);
-		if (pmd_none(*pmd)) {
-			end_address += PMD_SIZE;
-			continue;
-		}
-
-		pte = pte_offset_kernel(pmd, end_address);
-retry_pte:
-		if (pte_none(*pte)) {
-			end_address += PAGE_SIZE;
-			pte++;
-			if ((end_address < stop_address) &&
-			    (end_address != ALIGN(end_address, 1UL << PMD_SHIFT)))
-				goto retry_pte;
-			continue;
-		}
-		/* Found next valid vmem_map page */
-		break;
-	} while (end_address < stop_address);
-
-	end_address = min(end_address, stop_address);
-	end_address = end_address - (unsigned long) vmem_map + sizeof(struct page) - 1;
-	hole_next_pfn = end_address / sizeof(struct page);
-	return hole_next_pfn - pgdat->node_start_pfn;
-}
-
-int __init create_mem_map_page_table(u64 start, u64 end, void *arg)
-{
-	unsigned long address, start_page, end_page;
-	struct page *map_start, *map_end;
-	int node;
-	pgd_t *pgd;
-	p4d_t *p4d;
-	pud_t *pud;
-	pmd_t *pmd;
-	pte_t *pte;
-
-	map_start = vmem_map + (__pa(start) >> PAGE_SHIFT);
-	map_end   = vmem_map + (__pa(end) >> PAGE_SHIFT);
-
-	start_page = (unsigned long) map_start & PAGE_MASK;
-	end_page = PAGE_ALIGN((unsigned long) map_end);
-	node = paddr_to_nid(__pa(start));
-
-	for (address = start_page; address < end_page; address += PAGE_SIZE) {
-		pgd = pgd_offset_k(address);
-		if (pgd_none(*pgd)) {
-			p4d = memblock_alloc_node(PAGE_SIZE, PAGE_SIZE, node);
-			if (!p4d)
-				goto err_alloc;
-			pgd_populate(&init_mm, pgd, p4d);
-		}
-		p4d = p4d_offset(pgd, address);
-
-		if (p4d_none(*p4d)) {
-			pud = memblock_alloc_node(PAGE_SIZE, PAGE_SIZE, node);
-			if (!pud)
-				goto err_alloc;
-			p4d_populate(&init_mm, p4d, pud);
-		}
-		pud = pud_offset(p4d, address);
-
-		if (pud_none(*pud)) {
-			pmd = memblock_alloc_node(PAGE_SIZE, PAGE_SIZE, node);
-			if (!pmd)
-				goto err_alloc;
-			pud_populate(&init_mm, pud, pmd);
-		}
-		pmd = pmd_offset(pud, address);
-
-		if (pmd_none(*pmd)) {
-			pte = memblock_alloc_node(PAGE_SIZE, PAGE_SIZE, node);
-			if (!pte)
-				goto err_alloc;
-			pmd_populate_kernel(&init_mm, pmd, pte);
-		}
-		pte = pte_offset_kernel(pmd, address);
-
-		if (pte_none(*pte)) {
-			void *page = memblock_alloc_node(PAGE_SIZE, PAGE_SIZE,
-							 node);
-			if (!page)
-				goto err_alloc;
-			set_pte(pte, pfn_pte(__pa(page) >> PAGE_SHIFT,
-					     PAGE_KERNEL));
-		}
-	}
-	return 0;
-
-err_alloc:
-	panic("%s: Failed to allocate %lu bytes align=0x%lx nid=%d\n",
-	      __func__, PAGE_SIZE, PAGE_SIZE, node);
-	return -ENOMEM;
-}
-
-struct memmap_init_callback_data {
-	struct page *start;
-	struct page *end;
-	int nid;
-	unsigned long zone;
-};
-
-static int __meminit
-virtual_memmap_init(u64 start, u64 end, void *arg)
-{
-	struct memmap_init_callback_data *args;
-	struct page *map_start, *map_end;
-
-	args = (struct memmap_init_callback_data *) arg;
-	map_start = vmem_map + (__pa(start) >> PAGE_SHIFT);
-	map_end   = vmem_map + (__pa(end) >> PAGE_SHIFT);
-
-	if (map_start < args->start)
-		map_start = args->start;
-	if (map_end > args->end)
-		map_end = args->end;
-
-	/*
-	 * We have to initialize "out of bounds" struct page elements that fit completely
-	 * on the same pages that were allocated for the "in bounds" elements because they
-	 * may be referenced later (and found to be "reserved").
-	 */
-	map_start -= ((unsigned long) map_start & (PAGE_SIZE - 1)) / sizeof(struct page);
-	map_end += ((PAGE_ALIGN((unsigned long) map_end) - (unsigned long) map_end)
-		    / sizeof(struct page));
-
-	if (map_start < map_end)
-		memmap_init_range((unsigned long)(map_end - map_start),
-				 args->nid, args->zone, page_to_pfn(map_start), page_to_pfn(map_end),
-				 MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
-	return 0;
-}
-
-void __meminit memmap_init_zone(struct zone *zone)
-{
-	int nid = zone_to_nid(zone), zone_id = zone_idx(zone);
-	unsigned long start_pfn = zone->zone_start_pfn;
-	unsigned long size = zone->spanned_pages;
-
-	if (!vmem_map) {
-		memmap_init_range(size, nid, zone_id, start_pfn, start_pfn + size,
-				 MEMINIT_EARLY, NULL, MIGRATE_MOVABLE);
-	} else {
-		struct page *start;
-		struct memmap_init_callback_data args;
-
-		start = pfn_to_page(start_pfn);
-		args.start = start;
-		args.end = start + size;
-		args.nid = nid;
-		args.zone = zone_id;
-
-		efi_memmap_walk(virtual_memmap_init, &args);
-	}
-}
-
-int
-ia64_pfn_valid (unsigned long pfn)
-{
-	char byte;
-	struct page *pg = pfn_to_page(pfn);
-
-	return     (__get_user(byte, (char __user *) pg) == 0)
-		&& ((((u64)pg & PAGE_MASK) == (((u64)(pg + 1) - 1) & PAGE_MASK))
-			|| (__get_user(byte, (char __user *) (pg + 1) - 1) == 0));
-}
-EXPORT_SYMBOL(ia64_pfn_valid);
-
-#endif /* CONFIG_VIRTUAL_MEM_MAP */
-
 int __init register_active_ranges(u64 start, u64 len, int nid)
 {
 	u64 end = start + len;
@@ -644,13 +431,16 @@ mem_init (void)
 	 * _before_ any drivers that may need the PCI DMA interface are
 	 * initialized or bootmem has been freed.
 	 */
+	do {
 #ifdef CONFIG_INTEL_IOMMU
-	detect_intel_iommu();
-	if (!iommu_detected)
+		detect_intel_iommu();
+		if (iommu_detected)
+			break;
 #endif
 #ifdef CONFIG_SWIOTLB
 		swiotlb_init(1);
 #endif
+	} while (0);
 
 #ifdef CONFIG_FLATMEM
 	BUG_ON(!mem_map);
@@ -659,7 +449,6 @@ mem_init (void)
 	set_max_mapnr(max_low_pfn);
 	high_memory = __va(max_low_pfn * PAGE_SIZE);
 	memblock_free_all();
-	mem_init_print_info(NULL);
 
 	/*
 	 * For fsyscall entrpoints with no light-weight handler, use the ordinary
diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
index 14c1e541451c..1759ab875d47 100644
--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -153,5 +153,4 @@ void __init mem_init(void)
 	/* this will put all memory onto the freelists */
 	memblock_free_all();
 	init_pointer_tables();
-	mem_init_print_info(NULL);
 }
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 05cf1fb3f5ff..ab55c70380a5 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -131,7 +131,6 @@ void __init mem_init(void)
 	highmem_setup();
 #endif
 
-	mem_init_print_info(NULL);
 	mem_init_done = 1;
 }
 
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 702648f60e41..49a3c9cd1cb2 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -16,6 +16,7 @@ config MIPS
 	select ARCH_SUPPORTS_UPROBES
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_CMPXCHG_LOCKREF if 64BIT
+	select ARCH_USE_MEMTEST
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
diff --git a/arch/mips/loongson64/numa.c b/arch/mips/loongson64/numa.c
index 8315c871c435..fa9b4a487a47 100644
--- a/arch/mips/loongson64/numa.c
+++ b/arch/mips/loongson64/numa.c
@@ -178,7 +178,6 @@ void __init mem_init(void)
 	high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
 	memblock_free_all();
 	setup_zero_pages();	/* This comes from node 0 */
-	mem_init_print_info(NULL);
 }
 
 /* All PCI device belongs to logical Node-0 */
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 7719d632df8d..a7bf0c80371c 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -15,6 +15,7 @@
 #include <linux/syscalls.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 
 #include <asm/cacheflush.h>
 #include <asm/processor.h>
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 5cb73bf74a8b..c36358758969 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -467,7 +467,6 @@ void __init mem_init(void)
 	memblock_free_all();
 	setup_zero_pages();	/* Setup zeroed pages.  */
 	mem_init_free_highmem();
-	mem_init_print_info(NULL);
 
 #ifdef CONFIG_64BIT
 	if ((unsigned long) &_text > (unsigned long) CKSEG0)
diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c
index 87bb6945ec25..6173684b5aaa 100644
--- a/arch/mips/sgi-ip27/ip27-memory.c
+++ b/arch/mips/sgi-ip27/ip27-memory.c
@@ -420,5 +420,4 @@ void __init mem_init(void)
 	high_memory = (void *) __va(get_num_physpages() << PAGE_SHIFT);
 	memblock_free_all();
 	setup_zero_pages();	/* This comes from node 0 */
-	mem_init_print_info(NULL);
 }
diff --git a/arch/nds32/mm/init.c b/arch/nds32/mm/init.c
index fa86f7b2f416..f63f839738c4 100644
--- a/arch/nds32/mm/init.c
+++ b/arch/nds32/mm/init.c
@@ -191,7 +191,6 @@ void __init mem_init(void)
 
 	/* this will put all low memory onto the freelists */
 	memblock_free_all();
-	mem_init_print_info(NULL);
 
 	pr_info("virtual kernel memory layout:\n"
 		"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
diff --git a/arch/nios2/mm/cacheflush.c b/arch/nios2/mm/cacheflush.c
index 65de1bd6a760..6aa9257c3ede 100644
--- a/arch/nios2/mm/cacheflush.c
+++ b/arch/nios2/mm/cacheflush.c
@@ -11,6 +11,7 @@
 #include <linux/sched.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
+#include <linux/pagemap.h>
 
 #include <asm/cacheflush.h>
 #include <asm/cpuinfo.h>
diff --git a/arch/nios2/mm/init.c b/arch/nios2/mm/init.c
index 61862dbb0e32..613fcaa5988a 100644
--- a/arch/nios2/mm/init.c
+++ b/arch/nios2/mm/init.c
@@ -71,7 +71,6 @@ void __init mem_init(void)
 
 	/* this will put all memory onto the freelists */
 	memblock_free_all();
-	mem_init_print_info(NULL);
 }
 
 void __init mmu_init(void)
diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index bf9b2310fc93..d5641198b90c 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -211,8 +211,6 @@ void __init mem_init(void)
 	/* this will put all low memory onto the freelists */
 	memblock_free_all();
 
-	mem_init_print_info(NULL);
-
 	printk("mem_init_done ...........................................\n");
 	mem_init_done = 1;
 	return;
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 9ca4e4ff6895..591a4e939415 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -573,8 +573,6 @@ void __init mem_init(void)
 #endif
 		parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START);
 
-	mem_init_print_info(NULL);
-
 #if 0
 	/*
 	 * Do not expose the virtual kernel memory layout to userspace.
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c52b0a42062a..1e6230bea09d 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -151,6 +151,7 @@ config PPC
 	select ARCH_SUPPORTS_DEBUG_PAGEALLOC	if PPC32 || PPC_BOOK3S_64
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_CMPXCHG_LOCKREF		if PPC64
+	select ARCH_USE_MEMTEST
 	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS	if PPC_QUEUED_SPINLOCKS
 	select ARCH_WANT_IPC_PARSE_VERSION
diff --git a/arch/powerpc/include/asm/vmalloc.h b/arch/powerpc/include/asm/vmalloc.h
index b992dfaaa161..4c69ece52a31 100644
--- a/arch/powerpc/include/asm/vmalloc.h
+++ b/arch/powerpc/include/asm/vmalloc.h
@@ -1,4 +1,24 @@
 #ifndef _ASM_POWERPC_VMALLOC_H
 #define _ASM_POWERPC_VMALLOC_H
 
+#include <asm/mmu.h>
+#include <asm/page.h>
+
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+
+#define arch_vmap_pud_supported arch_vmap_pud_supported
+static inline bool arch_vmap_pud_supported(pgprot_t prot)
+{
+	/* HPT does not cope with large pages in the vmalloc area */
+	return radix_enabled();
+}
+
+#define arch_vmap_pmd_supported arch_vmap_pmd_supported
+static inline bool arch_vmap_pmd_supported(pgprot_t prot)
+{
+	return radix_enabled();
+}
+
+#endif
+
 #endif /* _ASM_POWERPC_VMALLOC_H */
diff --git a/arch/powerpc/kernel/isa-bridge.c b/arch/powerpc/kernel/isa-bridge.c
index 2257d24e6a26..39c625737c09 100644
--- a/arch/powerpc/kernel/isa-bridge.c
+++ b/arch/powerpc/kernel/isa-bridge.c
@@ -48,7 +48,7 @@ static void remap_isa_base(phys_addr_t pa, unsigned long size)
 	if (slab_is_available()) {
 		if (ioremap_page_range(ISA_IO_BASE, ISA_IO_BASE + size, pa,
 				pgprot_noncached(PAGE_KERNEL)))
-			unmap_kernel_range(ISA_IO_BASE, size);
+			vunmap_range(ISA_IO_BASE, ISA_IO_BASE + size);
 	} else {
 		early_ioremap_range(ISA_IO_BASE, pa, size,
 				pgprot_noncached(PAGE_KERNEL));
@@ -311,7 +311,7 @@ static void isa_bridge_remove(void)
 	isa_bridge_pcidev = NULL;
 
 	/* Unmap the ISA area */
-	unmap_kernel_range(ISA_IO_BASE, 0x10000);
+	vunmap_range(ISA_IO_BASE, ISA_IO_BASE + 0x10000);
 }
 
 /**
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 9312e6eda7ff..3fb7e572abed 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -140,7 +140,7 @@ void __iomem *ioremap_phb(phys_addr_t paddr, unsigned long size)
 	addr = (unsigned long)area->addr;
 	if (ioremap_page_range(addr, addr + size, paddr,
 			pgprot_noncached(PAGE_KERNEL))) {
-		unmap_kernel_range(addr, size);
+		vunmap_range(addr, addr + size);
 		return NULL;
 	}
 
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index 50d536ecc89b..5fef8db3b463 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -1082,22 +1082,6 @@ void radix__ptep_modify_prot_commit(struct vm_area_struct *vma,
 	set_pte_at(mm, addr, ptep, pte);
 }
 
-int __init arch_ioremap_pud_supported(void)
-{
-	/* HPT does not cope with large pages in the vmalloc area */
-	return radix_enabled();
-}
-
-int __init arch_ioremap_pmd_supported(void)
-{
-	return radix_enabled();
-}
-
-int p4d_free_pud_page(p4d_t *p4d, unsigned long addr)
-{
-	return 0;
-}
-
 int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
 {
 	pte_t *ptep = (pte_t *)pud;
@@ -1181,8 +1165,3 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
 
 	return 1;
 }
-
-int __init arch_ioremap_p4d_supported(void)
-{
-	return 0;
-}
diff --git a/arch/powerpc/mm/ioremap.c b/arch/powerpc/mm/ioremap.c
index b1a0aebe8c48..57342154d2b0 100644
--- a/arch/powerpc/mm/ioremap.c
+++ b/arch/powerpc/mm/ioremap.c
@@ -93,7 +93,7 @@ void __iomem *do_ioremap(phys_addr_t pa, phys_addr_t offset, unsigned long size,
 	if (!ret)
 		return (void __iomem *)area->addr + offset;
 
-	unmap_kernel_range(va, size);
+	vunmap_range(va, va + size);
 	free_vm_area(area);
 
 	return NULL;
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 6564b4d81324..043bbeaf407c 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -282,7 +282,6 @@ void __init mem_init(void)
 		(mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1;
 #endif
 
-	mem_init_print_info(NULL);
 #ifdef CONFIG_PPC32
 	pr_info("Kernel virtual memory layout:\n");
 #ifdef CONFIG_KASAN
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c
index 50469700dec6..a8304327072d 100644
--- a/arch/powerpc/sysdev/xive/common.c
+++ b/arch/powerpc/sysdev/xive/common.c
@@ -990,16 +990,12 @@ EXPORT_SYMBOL_GPL(is_xive_irq);
 void xive_cleanup_irq_data(struct xive_irq_data *xd)
 {
 	if (xd->eoi_mmio) {
-		unmap_kernel_range((unsigned long)xd->eoi_mmio,
-				   1u << xd->esb_shift);
 		iounmap(xd->eoi_mmio);
 		if (xd->eoi_mmio == xd->trig_mmio)
 			xd->trig_mmio = NULL;
 		xd->eoi_mmio = NULL;
 	}
 	if (xd->trig_mmio) {
-		unmap_kernel_range((unsigned long)xd->trig_mmio,
-				   1u << xd->esb_shift);
 		iounmap(xd->trig_mmio);
 		xd->trig_mmio = NULL;
 	}
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 067583ab1bd7..92e39cfa5227 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -102,7 +102,6 @@ void __init mem_init(void)
 	high_memory = (void *)(__va(PFN_PHYS(max_low_pfn)));
 	memblock_free_all();
 
-	mem_init_print_info(NULL);
 	print_vm_layout();
 }
 
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 0e76b2127dc6..8ac710de1ab1 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -209,8 +209,6 @@ void __init mem_init(void)
 	setup_zero_pages();	/* Setup zeroed pages. */
 
 	cmma_init_nodat();
-
-	mem_init_print_info(NULL);
 }
 
 void free_initmem(void)
diff --git a/arch/sh/include/asm/tlb.h b/arch/sh/include/asm/tlb.h
index 360f713d009b..aeb8915e9254 100644
--- a/arch/sh/include/asm/tlb.h
+++ b/arch/sh/include/asm/tlb.h
@@ -4,12 +4,11 @@
 
 #ifndef __ASSEMBLY__
 #include <linux/pagemap.h>
+#include <asm-generic/tlb.h>
 
 #ifdef CONFIG_MMU
 #include <linux/swap.h>
 
-#include <asm-generic/tlb.h>
-
 #if defined(CONFIG_CPU_SH4)
 extern void tlb_wire_entry(struct vm_area_struct *, unsigned long, pte_t);
 extern void tlb_unwire_entry(void);
@@ -24,12 +23,7 @@ static inline void tlb_unwire_entry(void)
 {
 	BUG();
 }
-#endif
-
-#else /* CONFIG_MMU */
-
-#include <asm-generic/tlb.h>
-
+#endif /* CONFIG_CPU_SH4 */
 #endif /* CONFIG_MMU */
 #endif /* __ASSEMBLY__ */
 #endif /* __ASM_SH_TLB_H */
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index ddfa9685f1ef..72c2e1b46c08 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -16,6 +16,7 @@
 #include <linux/mutex.h>
 #include <linux/fs.h>
 #include <linux/highmem.h>
+#include <linux/pagemap.h>
 #include <asm/mmu_context.h>
 #include <asm/cache_insns.h>
 #include <asm/cacheflush.h>
diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index 4c67b3d88775..9b63a53a5e46 100644
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -13,6 +13,7 @@
 #include <linux/mman.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
+#include <linux/pagemap.h>
 #include <linux/threads.h>
 #include <asm/addrspace.h>
 #include <asm/page.h>
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 0db6919af8d3..168d7d4dd735 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -359,7 +359,6 @@ void __init mem_init(void)
 
 	vsyscall_init();
 
-	mem_init_print_info(NULL);
 	pr_info("virtual kernel memory layout:\n"
 		"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 		"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index 632cdb959542..a5cf79c149fe 100644
--- a/arch/sparc/include/asm/pgtable_32.h
+++ b/arch/sparc/include/asm/pgtable_32.h
@@ -321,6 +321,9 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 		pgprot_val(newprot));
 }
 
+/* only used by the huge vmap code, should never be called */
+#define pud_page(pud)			NULL
+
 struct seq_file;
 void mmu_info(struct seq_file *m);
 
diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
index 6139c5700ccc..1e9f577f084d 100644
--- a/arch/sparc/mm/init_32.c
+++ b/arch/sparc/mm/init_32.c
@@ -292,8 +292,6 @@ void __init mem_init(void)
 
 		map_high_region(start_pfn, end_pfn);
 	}
-
-	mem_init_print_info(NULL);
 }
 
 void sparc_flush_page_to_ram(struct page *page)
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 182bb7bdaa0a..e454f179cf5d 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2520,7 +2520,6 @@ void __init mem_init(void)
 	}
 	mark_page_reserved(mem_map_zero);
 
-	mem_init_print_info(NULL);
 
 	if (tlb_type == cheetah || tlb_type == cheetah_plus)
 		cheetah_ecache_flush_init();
diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c
index 20ee14739333..9a725547578e 100644
--- a/arch/sparc/mm/tlb.c
+++ b/arch/sparc/mm/tlb.c
@@ -9,6 +9,7 @@
 #include <linux/mm.h>
 #include <linux/swap.h>
 #include <linux/preempt.h>
+#include <linux/pagemap.h>
 
 #include <asm/tlbflush.h>
 #include <asm/cacheflush.h>
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 9242dc91d751..9019ff5905b1 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -54,7 +54,6 @@ void __init mem_init(void)
 	memblock_free_all();
 	max_low_pfn = totalram_pages();
 	max_pfn = max_low_pfn;
-	mem_init_print_info(NULL);
 	kmalloc_ok = 1;
 }
 
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0fc82237414d..dac15f646f79 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -100,6 +100,7 @@ config X86
 	select ARCH_SUPPORTS_LTO_CLANG		if X86_64
 	select ARCH_SUPPORTS_LTO_CLANG_THIN	if X86_64
 	select ARCH_USE_BUILTIN_BSWAP
+	select ARCH_USE_MEMTEST
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_USE_SYM_ANNOTATIONS
diff --git a/arch/x86/include/asm/vmalloc.h b/arch/x86/include/asm/vmalloc.h
index 29837740b520..49ce331f3ac6 100644
--- a/arch/x86/include/asm/vmalloc.h
+++ b/arch/x86/include/asm/vmalloc.h
@@ -1,6 +1,26 @@
 #ifndef _ASM_X86_VMALLOC_H
 #define _ASM_X86_VMALLOC_H
 
+#include <asm/cpufeature.h>
+#include <asm/page.h>
 #include <asm/pgtable_areas.h>
 
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+
+#ifdef CONFIG_X86_64
+#define arch_vmap_pud_supported arch_vmap_pud_supported
+static inline bool arch_vmap_pud_supported(pgprot_t prot)
+{
+	return boot_cpu_has(X86_FEATURE_GBPAGES);
+}
+#endif
+
+#define arch_vmap_pmd_supported arch_vmap_pmd_supported
+static inline bool arch_vmap_pmd_supported(pgprot_t prot)
+{
+	return boot_cpu_has(X86_FEATURE_PSE);
+}
+
+#endif
+
 #endif /* _ASM_X86_VMALLOC_H */
diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
index 935af2ac6b1a..05a89e33fde2 100644
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
+++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -1458,7 +1458,7 @@ static int pseudo_lock_dev_release(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static int pseudo_lock_dev_mremap(struct vm_area_struct *area, unsigned long flags)
+static int pseudo_lock_dev_mremap(struct vm_area_struct *area)
 {
 	/* Not supported */
 	return -EINVAL;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index da31c2635ee4..21ffb03f6c72 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -755,8 +755,6 @@ void __init mem_init(void)
 	after_bootmem = 1;
 	x86_init.hyper.init_after_bootmem();
 
-	mem_init_print_info(NULL);
-
 	/*
 	 * Check boundaries twice: Some fundamental inconsistencies can
 	 * be detected at build time already.
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 55247451ba85..e527d829e1ed 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -826,6 +826,106 @@ void __init paging_init(void)
 	zone_sizes_init();
 }
 
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+#define PAGE_UNUSED 0xFD
+
+/*
+ * The unused vmemmap range, which was not yet memset(PAGE_UNUSED), ranges
+ * from unused_pmd_start to next PMD_SIZE boundary.
+ */
+static unsigned long unused_pmd_start __meminitdata;
+
+static void __meminit vmemmap_flush_unused_pmd(void)
+{
+	if (!unused_pmd_start)
+		return;
+	/*
+	 * Clears (unused_pmd_start, PMD_END]
+	 */
+	memset((void *)unused_pmd_start, PAGE_UNUSED,
+	       ALIGN(unused_pmd_start, PMD_SIZE) - unused_pmd_start);
+	unused_pmd_start = 0;
+}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+/* Returns true if the PMD is completely unused and thus it can be freed */
+static bool __meminit vmemmap_pmd_is_unused(unsigned long addr, unsigned long end)
+{
+	unsigned long start = ALIGN_DOWN(addr, PMD_SIZE);
+
+	/*
+	 * Flush the unused range cache to ensure that memchr_inv() will work
+	 * for the whole range.
+	 */
+	vmemmap_flush_unused_pmd();
+	memset((void *)addr, PAGE_UNUSED, end - addr);
+
+	return !memchr_inv((void *)start, PAGE_UNUSED, PMD_SIZE);
+}
+#endif
+
+static void __meminit __vmemmap_use_sub_pmd(unsigned long start)
+{
+	/*
+	 * As we expect to add in the same granularity as we remove, it's
+	 * sufficient to mark only some piece used to block the memmap page from
+	 * getting removed when removing some other adjacent memmap (just in
+	 * case the first memmap never gets initialized e.g., because the memory
+	 * block never gets onlined).
+	 */
+	memset((void *)start, 0, sizeof(struct page));
+}
+
+static void __meminit vmemmap_use_sub_pmd(unsigned long start, unsigned long end)
+{
+	/*
+	 * We only optimize if the new used range directly follows the
+	 * previously unused range (esp., when populating consecutive sections).
+	 */
+	if (unused_pmd_start == start) {
+		if (likely(IS_ALIGNED(end, PMD_SIZE)))
+			unused_pmd_start = 0;
+		else
+			unused_pmd_start = end;
+		return;
+	}
+
+	/*
+	 * If the range does not contiguously follows previous one, make sure
+	 * to mark the unused range of the previous one so it can be removed.
+	 */
+	vmemmap_flush_unused_pmd();
+	__vmemmap_use_sub_pmd(start);
+}
+
+
+static void __meminit vmemmap_use_new_sub_pmd(unsigned long start, unsigned long end)
+{
+	vmemmap_flush_unused_pmd();
+
+	/*
+	 * Could be our memmap page is filled with PAGE_UNUSED already from a
+	 * previous remove. Make sure to reset it.
+	 */
+	__vmemmap_use_sub_pmd(start);
+
+	/*
+	 * Mark with PAGE_UNUSED the unused parts of the new memmap range
+	 */
+	if (!IS_ALIGNED(start, PMD_SIZE))
+		memset((void *)start, PAGE_UNUSED,
+			start - ALIGN_DOWN(start, PMD_SIZE));
+
+	/*
+	 * We want to avoid memset(PAGE_UNUSED) when populating the vmemmap of
+	 * consecutive sections. Remember for the last added PMD where the
+	 * unused range begins.
+	 */
+	if (!IS_ALIGNED(end, PMD_SIZE))
+		unused_pmd_start = end;
+}
+#endif
+
 /*
  * Memory hotplug specific functions
  */
@@ -871,8 +971,6 @@ int arch_add_memory(int nid, u64 start, u64 size,
 	return add_pages(nid, start_pfn, nr_pages, params);
 }
 
-#define PAGE_INUSE 0xFD
-
 static void __meminit free_pagetable(struct page *page, int order)
 {
 	unsigned long magic;
@@ -962,7 +1060,6 @@ remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end,
 {
 	unsigned long next, pages = 0;
 	pte_t *pte;
-	void *page_addr;
 	phys_addr_t phys_addr;
 
 	pte = pte_start + pte_index(addr);
@@ -983,42 +1080,15 @@ remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end,
 		if (phys_addr < (phys_addr_t)0x40000000)
 			return;
 
-		if (PAGE_ALIGNED(addr) && PAGE_ALIGNED(next)) {
-			/*
-			 * Do not free direct mapping pages since they were
-			 * freed when offlining, or simply not in use.
-			 */
-			if (!direct)
-				free_pagetable(pte_page(*pte), 0);
-
-			spin_lock(&init_mm.page_table_lock);
-			pte_clear(&init_mm, addr, pte);
-			spin_unlock(&init_mm.page_table_lock);
-
-			/* For non-direct mapping, pages means nothing. */
-			pages++;
-		} else {
-			/*
-			 * If we are here, we are freeing vmemmap pages since
-			 * direct mapped memory ranges to be freed are aligned.
-			 *
-			 * If we are not removing the whole page, it means
-			 * other page structs in this page are being used and
-			 * we cannot remove them. So fill the unused page_structs
-			 * with 0xFD, and remove the page when it is wholly
-			 * filled with 0xFD.
-			 */
-			memset((void *)addr, PAGE_INUSE, next - addr);
+		if (!direct)
+			free_pagetable(pte_page(*pte), 0);
 
-			page_addr = page_address(pte_page(*pte));
-			if (!memchr_inv(page_addr, PAGE_INUSE, PAGE_SIZE)) {
-				free_pagetable(pte_page(*pte), 0);
+		spin_lock(&init_mm.page_table_lock);
+		pte_clear(&init_mm, addr, pte);
+		spin_unlock(&init_mm.page_table_lock);
 
-				spin_lock(&init_mm.page_table_lock);
-				pte_clear(&init_mm, addr, pte);
-				spin_unlock(&init_mm.page_table_lock);
-			}
-		}
+		/* For non-direct mapping, pages means nothing. */
+		pages++;
 	}
 
 	/* Call free_pte_table() in remove_pmd_table(). */
@@ -1034,7 +1104,6 @@ remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end,
 	unsigned long next, pages = 0;
 	pte_t *pte_base;
 	pmd_t *pmd;
-	void *page_addr;
 
 	pmd = pmd_start + pmd_index(addr);
 	for (; addr < end; addr = next, pmd++) {
@@ -1054,22 +1123,16 @@ remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end,
 				pmd_clear(pmd);
 				spin_unlock(&init_mm.page_table_lock);
 				pages++;
-			} else {
-				/* If here, we are freeing vmemmap pages. */
-				memset((void *)addr, PAGE_INUSE, next - addr);
-
-				page_addr = page_address(pmd_page(*pmd));
-				if (!memchr_inv(page_addr, PAGE_INUSE,
-						PMD_SIZE)) {
+			}
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+			else if (vmemmap_pmd_is_unused(addr, next)) {
 					free_hugepage_table(pmd_page(*pmd),
 							    altmap);
-
 					spin_lock(&init_mm.page_table_lock);
 					pmd_clear(pmd);
 					spin_unlock(&init_mm.page_table_lock);
-				}
 			}
-
+#endif
 			continue;
 		}
 
@@ -1090,7 +1153,6 @@ remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end,
 	unsigned long next, pages = 0;
 	pmd_t *pmd_base;
 	pud_t *pud;
-	void *page_addr;
 
 	pud = pud_start + pud_index(addr);
 	for (; addr < end; addr = next, pud++) {
@@ -1099,33 +1161,13 @@ remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end,
 		if (!pud_present(*pud))
 			continue;
 
-		if (pud_large(*pud)) {
-			if (IS_ALIGNED(addr, PUD_SIZE) &&
-			    IS_ALIGNED(next, PUD_SIZE)) {
-				if (!direct)
-					free_pagetable(pud_page(*pud),
-						       get_order(PUD_SIZE));
-
-				spin_lock(&init_mm.page_table_lock);
-				pud_clear(pud);
-				spin_unlock(&init_mm.page_table_lock);
-				pages++;
-			} else {
-				/* If here, we are freeing vmemmap pages. */
-				memset((void *)addr, PAGE_INUSE, next - addr);
-
-				page_addr = page_address(pud_page(*pud));
-				if (!memchr_inv(page_addr, PAGE_INUSE,
-						PUD_SIZE)) {
-					free_pagetable(pud_page(*pud),
-						       get_order(PUD_SIZE));
-
-					spin_lock(&init_mm.page_table_lock);
-					pud_clear(pud);
-					spin_unlock(&init_mm.page_table_lock);
-				}
-			}
-
+		if (pud_large(*pud) &&
+		    IS_ALIGNED(addr, PUD_SIZE) &&
+		    IS_ALIGNED(next, PUD_SIZE)) {
+			spin_lock(&init_mm.page_table_lock);
+			pud_clear(pud);
+			spin_unlock(&init_mm.page_table_lock);
+			pages++;
 			continue;
 		}
 
@@ -1197,6 +1239,9 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct,
 void __ref vmemmap_free(unsigned long start, unsigned long end,
 		struct vmem_altmap *altmap)
 {
+	VM_BUG_ON(!IS_ALIGNED(start, PAGE_SIZE));
+	VM_BUG_ON(!IS_ALIGNED(end, PAGE_SIZE));
+
 	remove_pagetable(start, end, false, altmap);
 }
 
@@ -1306,8 +1351,6 @@ void __init mem_init(void)
 		kclist_add(&kcore_vsyscall, (void *)VSYSCALL_ADDR, PAGE_SIZE, KCORE_USER);
 
 	preallocate_vmalloc_pages();
-
-	mem_init_print_info(NULL);
 }
 
 #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
@@ -1538,11 +1581,17 @@ static int __meminit vmemmap_populate_hugepages(unsigned long start,
 
 				addr_end = addr + PMD_SIZE;
 				p_end = p + PMD_SIZE;
+
+				if (!IS_ALIGNED(addr, PMD_SIZE) ||
+				    !IS_ALIGNED(next, PMD_SIZE))
+					vmemmap_use_new_sub_pmd(addr, next);
+
 				continue;
 			} else if (altmap)
 				return -ENOMEM; /* no fallback */
 		} else if (pmd_large(*pmd)) {
 			vmemmap_verify((pte_t *)pmd, node, addr, next);
+			vmemmap_use_sub_pmd(addr, next);
 			continue;
 		}
 		if (vmemmap_populate_basepages(addr, next, node, NULL))
@@ -1556,6 +1605,9 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
 {
 	int err;
 
+	VM_BUG_ON(!IS_ALIGNED(start, PAGE_SIZE));
+	VM_BUG_ON(!IS_ALIGNED(end, PAGE_SIZE));
+
 	if (end - start < PAGES_PER_SECTION * sizeof(struct page))
 		err = vmemmap_populate_basepages(start, end, node, NULL);
 	else if (boot_cpu_has(X86_FEATURE_PSE))
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 9e5ccc56f8e0..12c686c65ea9 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -481,25 +481,6 @@ void iounmap(volatile void __iomem *addr)
 }
 EXPORT_SYMBOL(iounmap);
 
-int __init arch_ioremap_p4d_supported(void)
-{
-	return 0;
-}
-
-int __init arch_ioremap_pud_supported(void)
-{
-#ifdef CONFIG_X86_64
-	return boot_cpu_has(X86_FEATURE_GBPAGES);
-#else
-	return 0;
-#endif
-}
-
-int __init arch_ioremap_pmd_supported(void)
-{
-	return boot_cpu_has(X86_FEATURE_PSE);
-}
-
 /*
  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
  * access
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index f6a9e2e36642..d27cf69e811d 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -780,14 +780,6 @@ int pmd_clear_huge(pmd_t *pmd)
 	return 0;
 }
 
-/*
- * Until we support 512GB pages, skip them in the vmap area.
- */
-int p4d_free_pud_page(p4d_t *p4d, unsigned long addr)
-{
-	return 0;
-}
-
 #ifdef CONFIG_X86_64
 /**
  * pud_free_pmd_page - Clear pud entry and free pmd page.
@@ -861,11 +853,6 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr)
 
 #else /* !CONFIG_X86_64 */
 
-int pud_free_pmd_page(pud_t *pud, unsigned long addr)
-{
-	return pud_none(*pud);
-}
-
 /*
  * Disable free page handling on x86-PAE. This assures that ioremap()
  * does not update sync'd pmd entries. See vmalloc_sync_one().
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 6ad4c1161518..2332b2156993 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -7,6 +7,7 @@ config XTENSA
 	select ARCH_HAS_SYNC_DMA_FOR_CPU if MMU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE if MMU
 	select ARCH_HAS_DMA_SET_UNCACHED if MMU
+	select ARCH_USE_MEMTEST
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_WANT_FRAME_POINTERS
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index 2daeba9e454e..6a32b2cf2718 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -119,7 +119,6 @@ void __init mem_init(void)
 
 	memblock_free_all();
 
-	mem_init_print_info(NULL);
 	pr_info("virtual kernel memory layout:\n"
 #ifdef CONFIG_KASAN
 		"    kasan   : 0x%08lx - 0x%08lx  (%5lu MB)\n"