Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:
 "257 patches.

  Subsystems affected by this patch series: scripts, ocfs2, vfs, and
  mm (slab-generic, slab, slub, kconfig, dax, kasan, debug, pagecache,
  gup, swap, memcg, pagemap, mprotect, mremap, iomap, tracing, vmalloc,
  pagealloc, memory-failure, hugetlb, userfaultfd, vmscan, tools,
  memblock, oom-kill, hugetlbfs, migration, thp, readahead, nommu, ksm,
  vmstat, madvise, memory-hotplug, rmap, zsmalloc, highmem, zram,
  cleanups, kfence, and damon)"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (257 commits)
  mm/damon: remove return value from before_terminate callback
  mm/damon: fix a few spelling mistakes in comments and a pr_debug message
  mm/damon: simplify stop mechanism
  Docs/admin-guide/mm/pagemap: wordsmith page flags descriptions
  Docs/admin-guide/mm/damon/start: simplify the content
  Docs/admin-guide/mm/damon/start: fix a wrong link
  Docs/admin-guide/mm/damon/start: fix wrong example commands
  mm/damon/dbgfs: add adaptive_targets list check before enable monitor_on
  mm/damon: remove unnecessary variable initialization
  Documentation/admin-guide/mm/damon: add a document for DAMON_RECLAIM
  mm/damon: introduce DAMON-based Reclamation (DAMON_RECLAIM)
  selftests/damon: support watermarks
  mm/damon/dbgfs: support watermarks
  mm/damon/schemes: activate schemes based on a watermarks mechanism
  tools/selftests/damon: update for regions prioritization of schemes
  mm/damon/dbgfs: support prioritization weights
  mm/damon/vaddr,paddr: support pageout prioritization
  mm/damon/schemes: prioritize regions within the quotas
  mm/damon/selftests: support schemes quotas
  mm/damon/dbgfs: support quotas of schemes
  ...

11 files changed, 18 insertions, 49 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b1d4b481fcdd..ed322ac00343 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -63,7 +63,7 @@ config X86
 	select ARCH_CLOCKSOURCE_INIT
 	select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if X86_64 && HUGETLB_PAGE && MIGRATION
-	select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64 || (X86_32 && HIGHMEM)
+	select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64
 	select ARCH_ENABLE_MEMORY_HOTREMOVE if MEMORY_HOTPLUG
 	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 || X86_PAE)
 	select ARCH_ENABLE_THP_MIGRATION if X86_64 && TRANSPARENT_HUGEPAGE
@@ -1627,7 +1627,7 @@ config ARCH_SELECT_MEMORY_MODEL
 
 config ARCH_MEMORY_PROBE
 	bool "Enable sysfs memory/probe interface"
-	depends on X86_64 && MEMORY_HOTPLUG
+	depends on MEMORY_HOTPLUG
 	help
 	  This option enables a sysfs memory/probe interface for testing.
 	  See Documentation/admin-guide/mm/memory-hotplug.rst for more information.
@@ -2423,7 +2423,7 @@ endmenu
 
 config ARCH_HAS_ADD_PAGES
 	def_bool y
-	depends on X86_64 && ARCH_ENABLE_MEMORY_HOTPLUG
+	depends on ARCH_ENABLE_MEMORY_HOTPLUG
 
 config ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
 	def_bool y
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 40ed44ead063..49b596db5631 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -322,7 +322,7 @@ static void __init reserve_initrd(void)
 
 	relocate_initrd();
 
-	memblock_free(ramdisk_image, ramdisk_end - ramdisk_image);
+	memblock_phys_free(ramdisk_image, ramdisk_end - ramdisk_image);
 }
 
 #else
@@ -521,7 +521,7 @@ static void __init reserve_crashkernel(void)
 	}
 
 	if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) {
-		memblock_free(crash_base, crash_size);
+		memblock_phys_free(crash_base, crash_size);
 		return;
 	}
 
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 5afd98559193..7b65275544b2 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -135,7 +135,7 @@ static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, size_t align)
 
 static void __init pcpu_fc_free(void *ptr, size_t size)
 {
-	memblock_free_ptr(ptr, size);
+	memblock_free(ptr, size);
 }
 
 static int __init pcpu_cpu_distance(unsigned int from, unsigned int to)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 23a14d82e783..1895986842b9 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -618,7 +618,7 @@ static void __init memory_map_top_down(unsigned long map_start,
 	 */
 	addr = memblock_phys_alloc_range(PMD_SIZE, PMD_SIZE, map_start,
 					 map_end);
-	memblock_free(addr, PMD_SIZE);
+	memblock_phys_free(addr, PMD_SIZE);
 	real_end = addr + PMD_SIZE;
 
 	/* step_size need to be small so pgt_buf from BRK could cover it */
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bd90b8fe81e4..5cd7ea6d645c 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -779,37 +779,6 @@ void __init mem_init(void)
 	test_wp_bit();
 }
 
-#ifdef CONFIG_MEMORY_HOTPLUG
-int arch_add_memory(int nid, u64 start, u64 size,
-		    struct mhp_params *params)
-{
-	unsigned long start_pfn = start >> PAGE_SHIFT;
-	unsigned long nr_pages = size >> PAGE_SHIFT;
-	int ret;
-
-	/*
-	 * The page tables were already mapped at boot so if the caller
-	 * requests a different mapping type then we must change all the
-	 * pages with __set_memory_prot().
-	 */
-	if (params->pgprot.pgprot != PAGE_KERNEL.pgprot) {
-		ret = __set_memory_prot(start, nr_pages, params->pgprot);
-		if (ret)
-			return ret;
-	}
-
-	return __add_pages(nid, start_pfn, nr_pages, params);
-}
-
-void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
-{
-	unsigned long start_pfn = start >> PAGE_SHIFT;
-	unsigned long nr_pages = size >> PAGE_SHIFT;
-
-	__remove_pages(start_pfn, nr_pages, altmap);
-}
-#endif
-
 int kernel_set_to_readonly __read_mostly;
 
 static void mark_nxdata_nx(void)
diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
index ef885370719a..e7b9b464a82f 100644
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@ -49,7 +49,7 @@ static void __init kasan_populate_pmd(pmd_t *pmd, unsigned long addr,
 			p = early_alloc(PMD_SIZE, nid, false);
 			if (p && pmd_set_huge(pmd, __pa(p), PAGE_KERNEL))
 				return;
-			memblock_free_ptr(p, PMD_SIZE);
+			memblock_free(p, PMD_SIZE);
 		}
 
 		p = early_alloc(PAGE_SIZE, nid, true);
@@ -85,7 +85,7 @@ static void __init kasan_populate_pud(pud_t *pud, unsigned long addr,
 			p = early_alloc(PUD_SIZE, nid, false);
 			if (p && pud_set_huge(pud, __pa(p), PAGE_KERNEL))
 				return;
-			memblock_free_ptr(p, PUD_SIZE);
+			memblock_free(p, PUD_SIZE);
 		}
 
 		p = early_alloc(PAGE_SIZE, nid, true);
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 1e9b93b088db..c6b1213086d6 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -355,7 +355,7 @@ void __init numa_reset_distance(void)
 
 	/* numa_distance could be 1LU marking allocation failure, test cnt */
 	if (numa_distance_cnt)
-		memblock_free_ptr(numa_distance, size);
+		memblock_free(numa_distance, size);
 	numa_distance_cnt = 0;
 	numa_distance = NULL;	/* enable table creation */
 }
diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c
index e801e30089c4..1a02b791d273 100644
--- a/arch/x86/mm/numa_emulation.c
+++ b/arch/x86/mm/numa_emulation.c
@@ -517,7 +517,7 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
 	}
 
 	/* free the copied physical distance table */
-	memblock_free_ptr(phys_dist, phys_size);
+	memblock_free(phys_dist, phys_size);
 	return;
 
 no_emu:
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index 1ce436eeda15..cdbf4822f431 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -1025,7 +1025,7 @@ static void __init xen_free_ro_pages(unsigned long paddr, unsigned long size)
 	for (; vaddr < vaddr_end; vaddr += PAGE_SIZE)
 		make_lowmem_page_readwrite(vaddr);
 
-	memblock_free(paddr, size);
+	memblock_phys_free(paddr, size);
 }
 
 static void __init xen_cleanmfnmap_free_pgtbl(void *pgtbl, bool unpin)
@@ -1151,7 +1151,7 @@ static void __init xen_pagetable_p2m_free(void)
 		xen_cleanhighmap(addr, addr + size);
 		size = PAGE_ALIGN(xen_start_info->nr_pages *
 				  sizeof(unsigned long));
-		memblock_free(__pa(addr), size);
+		memblock_free((void *)addr, size);
 	} else {
 		xen_cleanmfnmap(addr);
 	}
@@ -1956,7 +1956,7 @@ void __init xen_relocate_p2m(void)
 		pfn_end = p2m_pfn_end;
 	}
 
-	memblock_free(PFN_PHYS(pfn), PAGE_SIZE * (pfn_end - pfn));
+	memblock_phys_free(PFN_PHYS(pfn), PAGE_SIZE * (pfn_end - pfn));
 	while (pfn < pfn_end) {
 		if (pfn == p2m_pfn) {
 			pfn = p2m_pfn_end;
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index 5e6e236977c7..58db86f7b384 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -197,7 +197,7 @@ static void * __ref alloc_p2m_page(void)
 static void __ref free_p2m_page(void *p)
 {
 	if (unlikely(!slab_is_available())) {
-		memblock_free((unsigned long)p, PAGE_SIZE);
+		memblock_free(p, PAGE_SIZE);
 		return;
 	}
 
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 8bfc10330107..f387fc7e5250 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -153,7 +153,7 @@ static void __init xen_del_extra_mem(unsigned long start_pfn,
 			break;
 		}
 	}
-	memblock_free(PFN_PHYS(start_pfn), PFN_PHYS(n_pfns));
+	memblock_phys_free(PFN_PHYS(start_pfn), PFN_PHYS(n_pfns));
 }
 
 /*
@@ -719,7 +719,7 @@ static void __init xen_reserve_xen_mfnlist(void)
 		return;
 
 	xen_relocate_p2m();
-	memblock_free(start, size);
+	memblock_phys_free(start, size);
 }
 
 /**
@@ -885,7 +885,7 @@ char * __init xen_memory_setup(void)
 		xen_phys_memcpy(new_area, start, size);
 		pr_info("initrd moved from [mem %#010llx-%#010llx] to [mem %#010llx-%#010llx]\n",
 			start, start + size, new_area, new_area + size);
-		memblock_free(start, size);
+		memblock_phys_free(start, size);
 		boot_params.hdr.ramdisk_image = new_area;
 		boot_params.ext_ramdisk_image = new_area >> 32;
 	}