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, 40 insertions, 34 deletions

diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 2748a82de42a..a5f4be6b9213 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -194,67 +194,71 @@ static int gfs2_writepages(struct address_space *mapping,
 }
 
 /**
- * gfs2_write_jdata_pagevec - Write back a pagevec's worth of pages
+ * gfs2_write_jdata_batch - Write back a folio batch's worth of folios
  * @mapping: The mapping
  * @wbc: The writeback control
- * @pvec: The vector of pages
- * @nr_pages: The number of pages to write
+ * @fbatch: The batch of folios
  * @done_index: Page index
  *
  * Returns: non-zero if loop should terminate, zero otherwise
  */
 
-static int gfs2_write_jdata_pagevec(struct address_space *mapping,
+static int gfs2_write_jdata_batch(struct address_space *mapping,
 				    struct writeback_control *wbc,
-				    struct pagevec *pvec,
-				    int nr_pages,
+				    struct folio_batch *fbatch,
 				    pgoff_t *done_index)
 {
 	struct inode *inode = mapping->host;
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
-	unsigned nrblocks = nr_pages * (PAGE_SIZE >> inode->i_blkbits);
+	unsigned nrblocks;
 	int i;
 	int ret;
+	int nr_pages = 0;
+	int nr_folios = folio_batch_count(fbatch);
+
+	for (i = 0; i < nr_folios; i++)
+		nr_pages += folio_nr_pages(fbatch->folios[i]);
+	nrblocks = nr_pages * (PAGE_SIZE >> inode->i_blkbits);
 
 	ret = gfs2_trans_begin(sdp, nrblocks, nrblocks);
 	if (ret < 0)
 		return ret;
 
-	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];
 
-		*done_index = page->index;
+		*done_index = folio->index;
 
-		lock_page(page);
+		folio_lock(folio);
 
-		if (unlikely(page->mapping != mapping)) {
+		if (unlikely(folio->mapping != mapping)) {
 continue_unlock:
-			unlock_page(page);
+			folio_unlock(folio);
 			continue;
 		}
 
-		if (!PageDirty(page)) {
+		if (!folio_test_dirty(folio)) {
 			/* someone wrote it for us */
 			goto continue_unlock;
 		}
 
-		if (PageWriteback(page)) {
+		if (folio_test_writeback(folio)) {
 			if (wbc->sync_mode != WB_SYNC_NONE)
-				wait_on_page_writeback(page);
+				folio_wait_writeback(folio);
 			else
 				goto continue_unlock;
 		}
 
-		BUG_ON(PageWriteback(page));
-		if (!clear_page_dirty_for_io(page))
+		BUG_ON(folio_test_writeback(folio));
+		if (!folio_clear_dirty_for_io(folio))
 			goto continue_unlock;
 
 		trace_wbc_writepage(wbc, inode_to_bdi(inode));
 
-		ret = __gfs2_jdata_writepage(page, wbc);
+		ret = __gfs2_jdata_writepage(&folio->page, wbc);
 		if (unlikely(ret)) {
 			if (ret == AOP_WRITEPAGE_ACTIVATE) {
-				unlock_page(page);
+				folio_unlock(folio);
 				ret = 0;
 			} else {
 
@@ -267,7 +271,8 @@ continue_unlock:
 				 * not be suitable for data integrity
 				 * writeout).
 				 */
-				*done_index = page->index + 1;
+				*done_index = folio->index +
+					folio_nr_pages(folio);
 				ret = 1;
 				break;
 			}
@@ -304,8 +309,8 @@ static int gfs2_write_cache_jdata(struct address_space *mapping,
 {
 	int ret = 0;
 	int done = 0;
-	struct pagevec pvec;
-	int nr_pages;
+	struct folio_batch fbatch;
+	int nr_folios;
 	pgoff_t writeback_index;
 	pgoff_t index;
 	pgoff_t end;
@@ -314,7 +319,7 @@ static int gfs2_write_cache_jdata(struct address_space *mapping,
 	int range_whole = 0;
 	xa_mark_t tag;
 
-	pagevec_init(&pvec);
+	folio_batch_init(&fbatch);
 	if (wbc->range_cyclic) {
 		writeback_index = mapping->writeback_index; /* prev offset */
 		index = writeback_index;
@@ -340,17 +345,18 @@ retry:
 		tag_pages_for_writeback(mapping, index, end);
 	done_index = index;
 	while (!done && (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;
 
-		ret = gfs2_write_jdata_pagevec(mapping, wbc, &pvec, nr_pages, &done_index);
+		ret = gfs2_write_jdata_batch(mapping, wbc, &fbatch,
+				&done_index);
 		if (ret)
 			done = 1;
 		if (ret > 0)
 			ret = 0;
-		pagevec_release(&pvec);
+		folio_batch_release(&fbatch);
 		cond_resched();
 	}
 
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index ad14818a790a..4d99cc77a29b 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -39,7 +39,7 @@ static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
 	       "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page "
 	       "state 0x%lx\n",
 	       bh, (unsigned long long)bh->b_blocknr, bh->b_state,
-	       bh->b_page->mapping, bh->b_page->flags);
+	       bh->b_folio->mapping, bh->b_folio->flags);
 	fs_err(sdp, "AIL glock %u:%llu mapping %p\n",
 	       gl->gl_name.ln_type, gl->gl_name.ln_number,
 	       gfs2_glock2aspace(gl));
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 61323deb80bc..d750d1128bed 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -80,11 +80,11 @@ void gfs2_remove_from_ail(struct gfs2_bufdata *bd)
 	brelse(bd->bd_bh);
 }
 
-static int __gfs2_writepage(struct page *page, struct writeback_control *wbc,
+static int __gfs2_writepage(struct folio *folio, struct writeback_control *wbc,
 		       void *data)
 {
 	struct address_space *mapping = data;
-	int ret = mapping->a_ops->writepage(page, wbc);
+	int ret = mapping->a_ops->writepage(&folio->page, wbc);
 	mapping_set_error(mapping, ret);
 	return ret;
 }
@@ -136,7 +136,7 @@ __acquires(&sdp->sd_ail_lock)
 			continue;
 		gl = bd->bd_gl;
 		list_move(&bd->bd_ail_st_list, &tr->tr_ail1_list);
-		mapping = bh->b_page->mapping;
+		mapping = bh->b_folio->mapping;
 		if (!mapping)
 			continue;
 		spin_unlock(&sdp->sd_ail_lock);
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index 3c41b864ee5b..924361fa510b 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -334,7 +334,7 @@ int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh)
 
 void gfs2_remove_from_journal(struct buffer_head *bh, int meta)
 {
-	struct address_space *mapping = bh->b_page->mapping;
+	struct address_space *mapping = bh->b_folio->mapping;
 	struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping);
 	struct gfs2_bufdata *bd = bh->b_private;
 	struct gfs2_trans *tr = current->journal_info;