Merge tag 'mm-stable-2022-12-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - More userfaultfs work from Peter Xu

 - Several convert-to-folios series from Sidhartha Kumar and Huang Ying

 - Some filemap cleanups from Vishal Moola

 - David Hildenbrand added the ability to selftest anon memory COW
   handling

 - Some cpuset simplifications from Liu Shixin

 - Addition of vmalloc tracing support by Uladzislau Rezki

 - Some pagecache folioifications and simplifications from Matthew
   Wilcox

 - A pagemap cleanup from Kefeng Wang: we have VM_ACCESS_FLAGS, so use
   it

 - Miguel Ojeda contributed some cleanups for our use of the
   __no_sanitize_thread__ gcc keyword.

   This series should have been in the non-MM tree, my bad

 - Naoya Horiguchi improved the interaction between memory poisoning and
   memory section removal for huge pages

 - DAMON cleanups and tuneups from SeongJae Park

 - Tony Luck fixed the handling of COW faults against poisoned pages

 - Peter Xu utilized the PTE marker code for handling swapin errors

 - Hugh Dickins reworked compound page mapcount handling, simplifying it
   and making it more efficient

 - Removal of the autonuma savedwrite infrastructure from Nadav Amit and
   David Hildenbrand

 - zram support for multiple compression streams from Sergey Senozhatsky

 - David Hildenbrand reworked the GUP code's R/O long-term pinning so
   that drivers no longer need to use the FOLL_FORCE workaround which
   didn't work very well anyway

 - Mel Gorman altered the page allocator so that local IRQs can remnain
   enabled during per-cpu page allocations

 - Vishal Moola removed the try_to_release_page() wrapper

 - Stefan Roesch added some per-BDI sysfs tunables which are used to
   prevent network block devices from dirtying excessive amounts of
   pagecache

 - David Hildenbrand did some cleanup and repair work on KSM COW
   breaking

 - Nhat Pham and Johannes Weiner have implemented writeback in zswap's
   zsmalloc backend

 - Brian Foster has fixed a longstanding corner-case oddity in
   file[map]_write_and_wait_range()

 - sparse-vmemmap changes for MIPS, LoongArch and NIOS2 from Feiyang
   Chen

 - Shiyang Ruan has done some work on fsdax, to make its reflink mode
   work better under xfstests. Better, but still not perfect

 - Christoph Hellwig has removed the .writepage() method from several
   filesystems. They only need .writepages()

 - Yosry Ahmed wrote a series which fixes the memcg reclaim target
   beancounting

 - David Hildenbrand has fixed some of our MM selftests for 32-bit
   machines

 - Many singleton patches, as usual

* tag 'mm-stable-2022-12-13' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (313 commits)
  mm/hugetlb: set head flag before setting compound_order in __prep_compound_gigantic_folio
  mm: mmu_gather: allow more than one batch of delayed rmaps
  mm: fix typo in struct pglist_data code comment
  kmsan: fix memcpy tests
  mm: add cond_resched() in swapin_walk_pmd_entry()
  mm: do not show fs mm pc for VM_LOCKONFAULT pages
  selftests/vm: ksm_functional_tests: fixes for 32bit
  selftests/vm: cow: fix compile warning on 32bit
  selftests/vm: madv_populate: fix missing MADV_POPULATE_(READ|WRITE) definitions
  mm/gup_test: fix PIN_LONGTERM_TEST_READ with highmem
  mm,thp,rmap: fix races between updates of subpages_mapcount
  mm: memcg: fix swapcached stat accounting
  mm: add nodes= arg to memory.reclaim
  mm: disable top-tier fallback to reclaim on proactive reclaim
  selftests: cgroup: make sure reclaim target memcg is unprotected
  selftests: cgroup: refactor proactive reclaim code to reclaim_until()
  mm: memcg: fix stale protection of reclaim target memcg
  mm/mmap: properly unaccount memory on mas_preallocate() failure
  omfs: remove ->writepage
  jfs: remove ->writepage
  ...

2 files changed, 55 insertions, 13 deletions

diff --git a/arch/loongarch/mm/init.c b/arch/loongarch/mm/init.c
index 080061793c85..e018aed34586 100644
--- a/arch/loongarch/mm/init.c
+++ b/arch/loongarch/mm/init.c
@@ -22,7 +22,7 @@
 #include <linux/pfn.h>
 #include <linux/hardirq.h>
 #include <linux/gfp.h>
-#include <linux/initrd.h>
+#include <linux/hugetlb.h>
 #include <linux/mmzone.h>
 
 #include <asm/asm-offsets.h>
@@ -152,6 +152,45 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
 #endif
 #endif
 
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+void __meminit vmemmap_set_pmd(pmd_t *pmd, void *p, int node,
+			       unsigned long addr, unsigned long next)
+{
+	pmd_t entry;
+
+	entry = pfn_pmd(virt_to_pfn(p), PAGE_KERNEL);
+	pmd_val(entry) |= _PAGE_HUGE | _PAGE_HGLOBAL;
+	set_pmd_at(&init_mm, addr, pmd, entry);
+}
+
+int __meminit vmemmap_check_pmd(pmd_t *pmd, int node,
+				unsigned long addr, unsigned long next)
+{
+	int huge = pmd_val(*pmd) & _PAGE_HUGE;
+
+	if (huge)
+		vmemmap_verify((pte_t *)pmd, node, addr, next);
+
+	return huge;
+}
+
+int __meminit vmemmap_populate(unsigned long start, unsigned long end,
+			       int node, struct vmem_altmap *altmap)
+{
+#if CONFIG_PGTABLE_LEVELS == 2
+	return vmemmap_populate_basepages(start, end, node, NULL);
+#else
+	return vmemmap_populate_hugepages(start, end, node, NULL);
+#endif
+}
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+void vmemmap_free(unsigned long start, unsigned long end, struct vmem_altmap *altmap)
+{
+}
+#endif
+#endif
+
 static pte_t *fixmap_pte(unsigned long addr)
 {
 	pgd_t *pgd;
@@ -168,7 +207,7 @@ static pte_t *fixmap_pte(unsigned long addr)
 		new = memblock_alloc_low(PAGE_SIZE, PAGE_SIZE);
 		pgd_populate(&init_mm, pgd, new);
 #ifndef __PAGETABLE_PUD_FOLDED
-		pud_init((unsigned long)new, (unsigned long)invalid_pmd_table);
+		pud_init(new);
 #endif
 	}
 
@@ -179,7 +218,7 @@ static pte_t *fixmap_pte(unsigned long addr)
 		new = memblock_alloc_low(PAGE_SIZE, PAGE_SIZE);
 		pud_populate(&init_mm, pud, new);
 #ifndef __PAGETABLE_PMD_FOLDED
-		pmd_init((unsigned long)new, (unsigned long)invalid_pte_table);
+		pmd_init(new);
 #endif
 	}
 
diff --git a/arch/loongarch/mm/pgtable.c b/arch/loongarch/mm/pgtable.c
index ee179ccd3e3f..36a6dc0148ae 100644
--- a/arch/loongarch/mm/pgtable.c
+++ b/arch/loongarch/mm/pgtable.c
@@ -16,7 +16,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 	ret = (pgd_t *) __get_free_page(GFP_KERNEL);
 	if (ret) {
 		init = pgd_offset(&init_mm, 0UL);
-		pgd_init((unsigned long)ret);
+		pgd_init(ret);
 		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
 		       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
 	}
@@ -25,7 +25,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 }
 EXPORT_SYMBOL_GPL(pgd_alloc);
 
-void pgd_init(unsigned long page)
+void pgd_init(void *addr)
 {
 	unsigned long *p, *end;
 	unsigned long entry;
@@ -38,7 +38,7 @@ void pgd_init(unsigned long page)
 	entry = (unsigned long)invalid_pte_table;
 #endif
 
-	p = (unsigned long *) page;
+	p = (unsigned long *)addr;
 	end = p + PTRS_PER_PGD;
 
 	do {
@@ -56,11 +56,12 @@ void pgd_init(unsigned long page)
 EXPORT_SYMBOL_GPL(pgd_init);
 
 #ifndef __PAGETABLE_PMD_FOLDED
-void pmd_init(unsigned long addr, unsigned long pagetable)
+void pmd_init(void *addr)
 {
 	unsigned long *p, *end;
+	unsigned long pagetable = (unsigned long)invalid_pte_table;
 
-	p = (unsigned long *) addr;
+	p = (unsigned long *)addr;
 	end = p + PTRS_PER_PMD;
 
 	do {
@@ -79,9 +80,10 @@ EXPORT_SYMBOL_GPL(pmd_init);
 #endif
 
 #ifndef __PAGETABLE_PUD_FOLDED
-void pud_init(unsigned long addr, unsigned long pagetable)
+void pud_init(void *addr)
 {
 	unsigned long *p, *end;
+	unsigned long pagetable = (unsigned long)invalid_pmd_table;
 
 	p = (unsigned long *)addr;
 	end = p + PTRS_PER_PUD;
@@ -98,6 +100,7 @@ void pud_init(unsigned long addr, unsigned long pagetable)
 		p[-1] = pagetable;
 	} while (p != end);
 }
+EXPORT_SYMBOL_GPL(pud_init);
 #endif
 
 pmd_t mk_pmd(struct page *page, pgprot_t prot)
@@ -119,12 +122,12 @@ void set_pmd_at(struct mm_struct *mm, unsigned long addr,
 void __init pagetable_init(void)
 {
 	/* Initialize the entire pgd.  */
-	pgd_init((unsigned long)swapper_pg_dir);
-	pgd_init((unsigned long)invalid_pg_dir);
+	pgd_init(swapper_pg_dir);
+	pgd_init(invalid_pg_dir);
 #ifndef __PAGETABLE_PUD_FOLDED
-	pud_init((unsigned long)invalid_pud_table, (unsigned long)invalid_pmd_table);
+	pud_init(invalid_pud_table);
 #endif
 #ifndef __PAGETABLE_PMD_FOLDED
-	pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_table);
+	pmd_init(invalid_pmd_table);
 #endif
 }