Merge tag 'mm-stable-2023-02-20-13-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - Daniel Verkamp has contributed a memfd series ("mm/memfd: add
   F_SEAL_EXEC") which permits the setting of the memfd execute bit at
   memfd creation time, with the option of sealing the state of the X
   bit.

 - Peter Xu adds a patch series ("mm/hugetlb: Make huge_pte_offset()
   thread-safe for pmd unshare") which addresses a rare race condition
   related to PMD unsharing.

 - Several folioification patch serieses from Matthew Wilcox, Vishal
   Moola, Sidhartha Kumar and Lorenzo Stoakes

 - Johannes Weiner has a series ("mm: push down lock_page_memcg()")
   which does perform some memcg maintenance and cleanup work.

 - SeongJae Park has added DAMOS filtering to DAMON, with the series
   "mm/damon/core: implement damos filter".

   These filters provide users with finer-grained control over DAMOS's
   actions. SeongJae has also done some DAMON cleanup work.

 - Kairui Song adds a series ("Clean up and fixes for swap").

 - Vernon Yang contributed the series "Clean up and refinement for maple
   tree".

 - Yu Zhao has contributed the "mm: multi-gen LRU: memcg LRU" series. It
   adds to MGLRU an LRU of memcgs, to improve the scalability of global
   reclaim.

 - David Hildenbrand has added some userfaultfd cleanup work in the
   series "mm: uffd-wp + change_protection() cleanups".

 - Christoph Hellwig has removed the generic_writepages() library
   function in the series "remove generic_writepages".

 - Baolin Wang has performed some maintenance on the compaction code in
   his series "Some small improvements for compaction".

 - Sidhartha Kumar is doing some maintenance work on struct page in his
   series "Get rid of tail page fields".

 - David Hildenbrand contributed some cleanup, bugfixing and
   generalization of pte management and of pte debugging in his series
   "mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on all architectures with
   swap PTEs".

 - Mel Gorman and Neil Brown have removed the __GFP_ATOMIC allocation
   flag in the series "Discard __GFP_ATOMIC".

 - Sergey Senozhatsky has improved zsmalloc's memory utilization with
   his series "zsmalloc: make zspage chain size configurable".

 - Joey Gouly has added prctl() support for prohibiting the creation of
   writeable+executable mappings.

   The previous BPF-based approach had shortcomings. See "mm: In-kernel
   support for memory-deny-write-execute (MDWE)".

 - Waiman Long did some kmemleak cleanup and bugfixing in the series
   "mm/kmemleak: Simplify kmemleak_cond_resched() & fix UAF".

 - T.J. Alumbaugh has contributed some MGLRU cleanup work in his series
   "mm: multi-gen LRU: improve".

 - Jiaqi Yan has provided some enhancements to our memory error
   statistics reporting, mainly by presenting the statistics on a
   per-node basis. See the series "Introduce per NUMA node memory error
   statistics".

 - Mel Gorman has a second and hopefully final shot at fixing a CPU-hog
   regression in compaction via his series "Fix excessive CPU usage
   during compaction".

 - Christoph Hellwig does some vmalloc maintenance work in the series
   "cleanup vfree and vunmap".

 - Christoph Hellwig has removed block_device_operations.rw_page() in
   ths series "remove ->rw_page".

 - We get some maple_tree improvements and cleanups in Liam Howlett's
   series "VMA tree type safety and remove __vma_adjust()".

 - Suren Baghdasaryan has done some work on the maintainability of our
   vm_flags handling in the series "introduce vm_flags modifier
   functions".

 - Some pagemap cleanup and generalization work in Mike Rapoport's
   series "mm, arch: add generic implementation of pfn_valid() for
   FLATMEM" and "fixups for generic implementation of pfn_valid()"

 - Baoquan He has done some work to make /proc/vmallocinfo and
   /proc/kcore better represent the real state of things in his series
   "mm/vmalloc.c: allow vread() to read out vm_map_ram areas".

 - Jason Gunthorpe rationalized the GUP system's interface to the rest
   of the kernel in the series "Simplify the external interface for
   GUP".

 - SeongJae Park wishes to migrate people from DAMON's debugfs interface
   over to its sysfs interface. To support this, we'll temporarily be
   printing warnings when people use the debugfs interface. See the
   series "mm/damon: deprecate DAMON debugfs interface".

 - Andrey Konovalov provided the accurately named "lib/stackdepot: fixes
   and clean-ups" series.

 - Huang Ying has provided a dramatic reduction in migration's TLB flush
   IPI rates with the series "migrate_pages(): batch TLB flushing".

 - Arnd Bergmann has some objtool fixups in "objtool warning fixes".

* tag 'mm-stable-2023-02-20-13-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (505 commits)
  include/linux/migrate.h: remove unneeded externs
  mm/memory_hotplug: cleanup return value handing in do_migrate_range()
  mm/uffd: fix comment in handling pte markers
  mm: change to return bool for isolate_movable_page()
  mm: hugetlb: change to return bool for isolate_hugetlb()
  mm: change to return bool for isolate_lru_page()
  mm: change to return bool for folio_isolate_lru()
  objtool: add UACCESS exceptions for __tsan_volatile_read/write
  kmsan: disable ftrace in kmsan core code
  kasan: mark addr_has_metadata __always_inline
  mm: memcontrol: rename memcg_kmem_enabled()
  sh: initialize max_mapnr
  m68k/nommu: add missing definition of ARCH_PFN_OFFSET
  mm: percpu: fix incorrect size in pcpu_obj_full_size()
  maple_tree: reduce stack usage with gcc-9 and earlier
  mm: page_alloc: call panic() when memoryless node allocation fails
  mm: multi-gen LRU: avoid futile retries
  migrate_pages: move THP/hugetlb migration support check to simplify code
  migrate_pages: batch flushing TLB
  migrate_pages: share more code between _unmap and _move
  ...

4 files changed, 61 insertions, 62 deletions

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 7ac0a81bd371..6bdf61a62c79 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -801,7 +801,7 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
 	file_accessed(file);
 	if (IS_DAX(file_inode(file))) {
 		vma->vm_ops = &ext4_dax_vm_ops;
-		vma->vm_flags |= VM_HUGEPAGE;
+		vm_flags_set(vma, VM_HUGEPAGE);
 	} else {
 		vma->vm_ops = &ext4_file_vm_ops;
 	}
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index b936ee3af51e..f67d0e1bf4e0 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2596,8 +2596,8 @@ static bool ext4_page_nomap_can_writeout(struct page *page)
 static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
 {
 	struct address_space *mapping = mpd->inode->i_mapping;
-	struct pagevec pvec;
-	unsigned int nr_pages;
+	struct folio_batch fbatch;
+	unsigned int nr_folios;
 	long left = mpd->wbc->nr_to_write;
 	pgoff_t index = mpd->first_page;
 	pgoff_t end = mpd->last_page;
@@ -2611,18 +2611,17 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
 		tag = PAGECACHE_TAG_TOWRITE;
 	else
 		tag = PAGECACHE_TAG_DIRTY;
-
-	pagevec_init(&pvec);
+	folio_batch_init(&fbatch);
 	mpd->map.m_len = 0;
 	mpd->next_page = index;
 	while (index <= end) {
-		nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
-				tag);
-		if (nr_pages == 0)
+		nr_folios = filemap_get_folios_tag(mapping, &index, end,
+				tag, &fbatch);
+		if (nr_folios == 0)
 			break;
 
-		for (i = 0; i < nr_pages; i++) {
-			struct page *page = pvec.pages[i];
+		for (i = 0; i < nr_folios; i++) {
+			struct folio *folio = fbatch.folios[i];
 
 			/*
 			 * Accumulated enough dirty pages? This doesn't apply
@@ -2636,10 +2635,10 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
 				goto out;
 
 			/* If we can't merge this page, we are done. */
-			if (mpd->map.m_len > 0 && mpd->next_page != page->index)
+			if (mpd->map.m_len > 0 && mpd->next_page != folio->index)
 				goto out;
 
-			lock_page(page);
+			folio_lock(folio);
 			/*
 			 * If the page is no longer dirty, or its mapping no
 			 * longer corresponds to inode we are writing (which
@@ -2647,16 +2646,16 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
 			 * page is already under writeback and we are not doing
 			 * a data integrity writeback, skip the page
 			 */
-			if (!PageDirty(page) ||
-			    (PageWriteback(page) &&
+			if (!folio_test_dirty(folio) ||
+			    (folio_test_writeback(folio) &&
 			     (mpd->wbc->sync_mode == WB_SYNC_NONE)) ||
-			    unlikely(page->mapping != mapping)) {
-				unlock_page(page);
+			    unlikely(folio->mapping != mapping)) {
+				folio_unlock(folio);
 				continue;
 			}
 
-			wait_on_page_writeback(page);
-			BUG_ON(PageWriteback(page));
+			folio_wait_writeback(folio);
+			BUG_ON(folio_test_writeback(folio));
 
 			/*
 			 * Should never happen but for buggy code in
@@ -2667,56 +2666,56 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
 			 *
 			 * [1] https://lore.kernel.org/linux-mm/20180103100430.GE4911@quack2.suse.cz
 			 */
-			if (!page_has_buffers(page)) {
-				ext4_warning_inode(mpd->inode, "page %lu does not have buffers attached", page->index);
-				ClearPageDirty(page);
-				unlock_page(page);
+			if (!folio_buffers(folio)) {
+				ext4_warning_inode(mpd->inode, "page %lu does not have buffers attached", folio->index);
+				folio_clear_dirty(folio);
+				folio_unlock(folio);
 				continue;
 			}
 
 			if (mpd->map.m_len == 0)
-				mpd->first_page = page->index;
-			mpd->next_page = page->index + 1;
+				mpd->first_page = folio->index;
+			mpd->next_page = folio->index + folio_nr_pages(folio);
 			/*
 			 * Writeout for transaction commit where we cannot
 			 * modify metadata is simple. Just submit the page.
 			 */
 			if (!mpd->can_map) {
-				if (ext4_page_nomap_can_writeout(page)) {
-					err = mpage_submit_page(mpd, page);
+				if (ext4_page_nomap_can_writeout(&folio->page)) {
+					err = mpage_submit_page(mpd, &folio->page);
 					if (err < 0)
 						goto out;
 				} else {
-					unlock_page(page);
-					mpd->first_page++;
+					folio_unlock(folio);
+					mpd->first_page += folio_nr_pages(folio);
 				}
 			} else {
 				/* Add all dirty buffers to mpd */
-				lblk = ((ext4_lblk_t)page->index) <<
+				lblk = ((ext4_lblk_t)folio->index) <<
 					(PAGE_SHIFT - blkbits);
-				head = page_buffers(page);
+				head = folio_buffers(folio);
 				err = mpage_process_page_bufs(mpd, head, head,
-							      lblk);
+						lblk);
 				if (err <= 0)
 					goto out;
 				err = 0;
 			}
-			left--;
+			left -= folio_nr_pages(folio);
 		}
-		pagevec_release(&pvec);
+		folio_batch_release(&fbatch);
 		cond_resched();
 	}
 	mpd->scanned_until_end = 1;
 	return 0;
 out:
-	pagevec_release(&pvec);
+	folio_batch_release(&fbatch);
 	return err;
 }
 
-static int ext4_writepage_cb(struct page *page, struct writeback_control *wbc,
+static int ext4_writepage_cb(struct folio *folio, struct writeback_control *wbc,
 			     void *data)
 {
-	return ext4_writepage(page, wbc);
+	return ext4_writepage(&folio->page, wbc);
 }
 
 static int ext4_do_writepages(struct mpage_da_data *mpd)
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 8dbb87edf24c..2de9829aed63 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -110,22 +110,23 @@ out:
 }
 
 /**
- * mext_page_double_lock - Grab and lock pages on both @inode1 and @inode2
+ * mext_folio_double_lock - Grab and lock folio on both @inode1 and @inode2
  *
  * @inode1:	the inode structure
  * @inode2:	the inode structure
- * @index1:	page index
- * @index2:	page index
- * @page:	result page vector
+ * @index1:	folio index
+ * @index2:	folio index
+ * @folio:	result folio vector
  *
- * Grab two locked pages for inode's by inode order
+ * Grab two locked folio for inode's by inode order
  */
 static int
-mext_page_double_lock(struct inode *inode1, struct inode *inode2,
-		      pgoff_t index1, pgoff_t index2, struct page *page[2])
+mext_folio_double_lock(struct inode *inode1, struct inode *inode2,
+		      pgoff_t index1, pgoff_t index2, struct folio *folio[2])
 {
 	struct address_space *mapping[2];
 	unsigned int flags;
+	unsigned fgp_flags = FGP_LOCK | FGP_WRITE | FGP_CREAT | FGP_STABLE;
 
 	BUG_ON(!inode1 || !inode2);
 	if (inode1 < inode2) {
@@ -138,28 +139,30 @@ mext_page_double_lock(struct inode *inode1, struct inode *inode2,
 	}
 
 	flags = memalloc_nofs_save();
-	page[0] = grab_cache_page_write_begin(mapping[0], index1);
-	if (!page[0]) {
+	folio[0] = __filemap_get_folio(mapping[0], index1, fgp_flags,
+			mapping_gfp_mask(mapping[0]));
+	if (!folio[0]) {
 		memalloc_nofs_restore(flags);
 		return -ENOMEM;
 	}
 
-	page[1] = grab_cache_page_write_begin(mapping[1], index2);
+	folio[1] = __filemap_get_folio(mapping[1], index2, fgp_flags,
+			mapping_gfp_mask(mapping[1]));
 	memalloc_nofs_restore(flags);
-	if (!page[1]) {
-		unlock_page(page[0]);
-		put_page(page[0]);
+	if (!folio[1]) {
+		folio_unlock(folio[0]);
+		folio_put(folio[0]);
 		return -ENOMEM;
 	}
 	/*
-	 * grab_cache_page_write_begin() may not wait on page's writeback if
+	 * __filemap_get_folio() may not wait on folio's writeback if
 	 * BDI not demand that. But it is reasonable to be very conservative
-	 * here and explicitly wait on page's writeback
+	 * here and explicitly wait on folio's writeback
 	 */
-	wait_on_page_writeback(page[0]);
-	wait_on_page_writeback(page[1]);
+	folio_wait_writeback(folio[0]);
+	folio_wait_writeback(folio[1]);
 	if (inode1 > inode2)
-		swap(page[0], page[1]);
+		swap(folio[0], folio[1]);
 
 	return 0;
 }
@@ -252,7 +255,6 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
 		     int block_len_in_page, int unwritten, int *err)
 {
 	struct inode *orig_inode = file_inode(o_filp);
-	struct page *pagep[2] = {NULL, NULL};
 	struct folio *folio[2] = {NULL, NULL};
 	handle_t *handle;
 	ext4_lblk_t orig_blk_offset, donor_blk_offset;
@@ -303,8 +305,8 @@ again:
 
 	replaced_size = data_size;
 
-	*err = mext_page_double_lock(orig_inode, donor_inode, orig_page_offset,
-				     donor_page_offset, pagep);
+	*err = mext_folio_double_lock(orig_inode, donor_inode, orig_page_offset,
+				     donor_page_offset, folio);
 	if (unlikely(*err < 0))
 		goto stop_journal;
 	/*
@@ -314,8 +316,6 @@ again:
 	 * hold page's lock, if it is still the case data copy is not
 	 * necessary, just swap data blocks between orig and donor.
 	 */
-	folio[0] = page_folio(pagep[0]);
-	folio[1] = page_folio(pagep[1]);
 
 	VM_BUG_ON_FOLIO(folio_test_large(folio[0]), folio[0]);
 	VM_BUG_ON_FOLIO(folio_test_large(folio[1]), folio[1]);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2ae46d11aa30..faae05493471 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -482,7 +482,7 @@ static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn)
  *
  * However, we may have to redirty a page (see below.)
  */
-static int ext4_journalled_writepage_callback(struct page *page,
+static int ext4_journalled_writepage_callback(struct folio *folio,
 					      struct writeback_control *wbc,
 					      void *data)
 {
@@ -490,7 +490,7 @@ static int ext4_journalled_writepage_callback(struct page *page,
 	struct buffer_head *bh, *head;
 	struct journal_head *jh;
 
-	bh = head = page_buffers(page);
+	bh = head = folio_buffers(folio);
 	do {
 		/*
 		 * We have to redirty a page in these cases:
@@ -509,7 +509,7 @@ static int ext4_journalled_writepage_callback(struct page *page,
 		if (buffer_dirty(bh) ||
 		    (jh && (jh->b_transaction != transaction ||
 			    jh->b_next_transaction))) {
-			redirty_page_for_writepage(wbc, page);
+			folio_redirty_for_writepage(wbc, folio);
 			goto out;
 		}
 	} while ((bh = bh->b_this_page) != head);