Merge tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:
 "Most of the MM queue. A few things are still pending.

  Liam's maple tree rework didn't make it. This has resulted in a few
  other minor patch series being held over for next time.

  Multi-gen LRU still isn't merged as we were waiting for mapletree to
  stabilize. The current plan is to merge MGLRU into -mm soon and to
  later reintroduce mapletree, with a view to hopefully getting both
  into 6.1-rc1.

  Summary:

   - The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe
     Lin, Yang Shi, Anshuman Khandual and Mike Rapoport

   - Some kmemleak fixes from Patrick Wang and Waiman Long

   - DAMON updates from SeongJae Park

   - memcg debug/visibility work from Roman Gushchin

   - vmalloc speedup from Uladzislau Rezki

   - more folio conversion work from Matthew Wilcox

   - enhancements for coherent device memory mapping from Alex Sierra

   - addition of shared pages tracking and CoW support for fsdax, from
     Shiyang Ruan

   - hugetlb optimizations from Mike Kravetz

   - Mel Gorman has contributed some pagealloc changes to improve
     latency and realtime behaviour.

   - mprotect soft-dirty checking has been improved by Peter Xu

   - Many other singleton patches all over the place"

 [ XFS merge from hell as per Darrick Wong in

   https://lore.kernel.org/all/YshKnxb4VwXycPO8@magnolia/ ]

* tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (282 commits)
  tools/testing/selftests/vm/hmm-tests.c: fix build
  mm: Kconfig: fix typo
  mm: memory-failure: convert to pr_fmt()
  mm: use is_zone_movable_page() helper
  hugetlbfs: fix inaccurate comment in hugetlbfs_statfs()
  hugetlbfs: cleanup some comments in inode.c
  hugetlbfs: remove unneeded header file
  hugetlbfs: remove unneeded hugetlbfs_ops forward declaration
  hugetlbfs: use helper macro SZ_1{K,M}
  mm: cleanup is_highmem()
  mm/hmm: add a test for cross device private faults
  selftests: add soft-dirty into run_vmtests.sh
  selftests: soft-dirty: add test for mprotect
  mm/mprotect: fix soft-dirty check in can_change_pte_writable()
  mm: memcontrol: fix potential oom_lock recursion deadlock
  mm/gup.c: fix formatting in check_and_migrate_movable_page()
  xfs: fail dax mount if reflink is enabled on a partition
  mm/memcontrol.c: remove the redundant updating of stats_flush_threshold
  userfaultfd: don't fail on unrecognized features
  hugetlb_cgroup: fix wrong hugetlb cgroup numa stat
  ...

1 files changed, 28 insertions, 29 deletions

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 1213d0c67a53..fad6d1f2262a 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -43,30 +43,22 @@
 #include "shuffle.h"
 
 #ifdef CONFIG_MHP_MEMMAP_ON_MEMORY
-static int memmap_on_memory_set(const char *val, const struct kernel_param *kp)
-{
-	if (hugetlb_optimize_vmemmap_enabled())
-		return 0;
-	return param_set_bool(val, kp);
-}
-
-static const struct kernel_param_ops memmap_on_memory_ops = {
-	.flags	= KERNEL_PARAM_OPS_FL_NOARG,
-	.set	= memmap_on_memory_set,
-	.get	= param_get_bool,
-};
-
 /*
  * memory_hotplug.memmap_on_memory parameter
  */
 static bool memmap_on_memory __ro_after_init;
-module_param_cb(memmap_on_memory, &memmap_on_memory_ops, &memmap_on_memory, 0444);
+module_param(memmap_on_memory, bool, 0444);
 MODULE_PARM_DESC(memmap_on_memory, "Enable memmap on memory for memory hotplug");
 
-bool mhp_memmap_on_memory(void)
+static inline bool mhp_memmap_on_memory(void)
 {
 	return memmap_on_memory;
 }
+#else
+static inline bool mhp_memmap_on_memory(void)
+{
+	return false;
+}
 #endif
 
 enum {
@@ -237,8 +229,7 @@ static void release_memory_resource(struct resource *res)
 	kfree(res);
 }
 
-static int check_pfn_span(unsigned long pfn, unsigned long nr_pages,
-		const char *reason)
+static int check_pfn_span(unsigned long pfn, unsigned long nr_pages)
 {
 	/*
 	 * Disallow all operations smaller than a sub-section and only
@@ -255,12 +246,8 @@ static int check_pfn_span(unsigned long pfn, unsigned long nr_pages,
 		min_align = PAGES_PER_SUBSECTION;
 	else
 		min_align = PAGES_PER_SECTION;
-	if (!IS_ALIGNED(pfn, min_align)
-			|| !IS_ALIGNED(nr_pages, min_align)) {
-		WARN(1, "Misaligned __%s_pages start: %#lx end: #%lx\n",
-				reason, pfn, pfn + nr_pages - 1);
+	if (!IS_ALIGNED(pfn | nr_pages, min_align))
 		return -EINVAL;
-	}
 	return 0;
 }
 
@@ -337,9 +324,10 @@ int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages,
 		altmap->alloc = 0;
 	}
 
-	err = check_pfn_span(pfn, nr_pages, "add");
-	if (err)
-		return err;
+	if (check_pfn_span(pfn, nr_pages)) {
+		WARN(1, "Misaligned %s start: %#lx end: #%lx\n", __func__, pfn, pfn + nr_pages - 1);
+		return -EINVAL;
+	}
 
 	for (; pfn < end_pfn; pfn += cur_nr_pages) {
 		/* Select all remaining pages up to the next section boundary */
@@ -536,8 +524,10 @@ void __remove_pages(unsigned long pfn, unsigned long nr_pages,
 
 	map_offset = vmem_altmap_offset(altmap);
 
-	if (check_pfn_span(pfn, nr_pages, "remove"))
+	if (check_pfn_span(pfn, nr_pages)) {
+		WARN(1, "Misaligned %s start: %#lx end: #%lx\n", __func__, pfn, pfn + nr_pages - 1);
 		return;
+	}
 
 	for (; pfn < end_pfn; pfn += cur_nr_pages) {
 		cond_resched();
@@ -672,12 +662,18 @@ static void __meminit resize_pgdat_range(struct pglist_data *pgdat, unsigned lon
 
 }
 
+#ifdef CONFIG_ZONE_DEVICE
 static void section_taint_zone_device(unsigned long pfn)
 {
 	struct mem_section *ms = __pfn_to_section(pfn);
 
 	ms->section_mem_map |= SECTION_TAINT_ZONE_DEVICE;
 }
+#else
+static inline void section_taint_zone_device(unsigned long pfn)
+{
+}
+#endif
 
 /*
  * Associate the pfn range with the given zone, initializing the memmaps
@@ -936,7 +932,7 @@ static struct zone *auto_movable_zone_for_pfn(int nid,
 			if (!page)
 				continue;
 			/* If anything is !MOVABLE online the rest !MOVABLE. */
-			if (page_zonenum(page) != ZONE_MOVABLE)
+			if (!is_zone_movable_page(page))
 				goto kernel_zone;
 			online_pages += PAGES_PER_SECTION;
 		}
@@ -1031,7 +1027,7 @@ int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
 			      struct zone *zone)
 {
 	unsigned long end_pfn = pfn + nr_pages;
-	int ret;
+	int ret, i;
 
 	ret = kasan_add_zero_shadow(__va(PFN_PHYS(pfn)), PFN_PHYS(nr_pages));
 	if (ret)
@@ -1039,6 +1035,9 @@ int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages,
 
 	move_pfn_range_to_zone(zone, pfn, nr_pages, NULL, MIGRATE_UNMOVABLE);
 
+	for (i = 0; i < nr_pages; i++)
+		SetPageVmemmapSelfHosted(pfn_to_page(pfn + i));
+
 	/*
 	 * It might be that the vmemmap_pages fully span sections. If that is
 	 * the case, mark those sections online here as otherwise they will be
@@ -1643,7 +1642,7 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
 
 		if (PageHuge(page)) {
 			pfn = page_to_pfn(head) + compound_nr(head) - 1;
-			isolate_huge_page(head, &source);
+			isolate_hugetlb(head, &source);
 			continue;
 		} else if (PageTransHuge(page))
 			pfn = page_to_pfn(head) + thp_nr_pages(page) - 1;