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
  ...

1 files changed, 31 insertions, 21 deletions

diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 044e34cd835c..8dbb87edf24c 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -253,6 +253,7 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
 {
 	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;
 	unsigned long blocksize = orig_inode->i_sb->s_blocksize;
@@ -313,6 +314,13 @@ 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]);
+	VM_BUG_ON_FOLIO(folio_nr_pages(folio[0]) != folio_nr_pages(folio[1]), folio[1]);
+
 	if (unwritten) {
 		ext4_double_down_write_data_sem(orig_inode, donor_inode);
 		/* If any of extents in range became initialized we have to
@@ -331,10 +339,10 @@ again:
 			ext4_double_up_write_data_sem(orig_inode, donor_inode);
 			goto data_copy;
 		}
-		if ((page_has_private(pagep[0]) &&
-		     !try_to_release_page(pagep[0], 0)) ||
-		    (page_has_private(pagep[1]) &&
-		     !try_to_release_page(pagep[1], 0))) {
+		if ((folio_has_private(folio[0]) &&
+		     !filemap_release_folio(folio[0], 0)) ||
+		    (folio_has_private(folio[1]) &&
+		     !filemap_release_folio(folio[1], 0))) {
 			*err = -EBUSY;
 			goto drop_data_sem;
 		}
@@ -344,19 +352,21 @@ again:
 						   block_len_in_page, 1, err);
 	drop_data_sem:
 		ext4_double_up_write_data_sem(orig_inode, donor_inode);
-		goto unlock_pages;
+		goto unlock_folios;
 	}
 data_copy:
-	*err = mext_page_mkuptodate(pagep[0], from, from + replaced_size);
+	*err = mext_page_mkuptodate(&folio[0]->page, from, from + replaced_size);
 	if (*err)
-		goto unlock_pages;
+		goto unlock_folios;
 
 	/* At this point all buffers in range are uptodate, old mapping layout
 	 * is no longer required, try to drop it now. */
-	if ((page_has_private(pagep[0]) && !try_to_release_page(pagep[0], 0)) ||
-	    (page_has_private(pagep[1]) && !try_to_release_page(pagep[1], 0))) {
+	if ((folio_has_private(folio[0]) &&
+		!filemap_release_folio(folio[0], 0)) ||
+	    (folio_has_private(folio[1]) &&
+		!filemap_release_folio(folio[1], 0))) {
 		*err = -EBUSY;
-		goto unlock_pages;
+		goto unlock_folios;
 	}
 	ext4_double_down_write_data_sem(orig_inode, donor_inode);
 	replaced_count = ext4_swap_extents(handle, orig_inode, donor_inode,
@@ -369,13 +379,13 @@ data_copy:
 			replaced_size =
 				block_len_in_page << orig_inode->i_blkbits;
 		} else
-			goto unlock_pages;
+			goto unlock_folios;
 	}
 	/* Perform all necessary steps similar write_begin()/write_end()
 	 * but keeping in mind that i_size will not change */
-	if (!page_has_buffers(pagep[0]))
-		create_empty_buffers(pagep[0], 1 << orig_inode->i_blkbits, 0);
-	bh = page_buffers(pagep[0]);
+	if (!folio_buffers(folio[0]))
+		create_empty_buffers(&folio[0]->page, 1 << orig_inode->i_blkbits, 0);
+	bh = folio_buffers(folio[0]);
 	for (i = 0; i < data_offset_in_page; i++)
 		bh = bh->b_this_page;
 	for (i = 0; i < block_len_in_page; i++) {
@@ -385,7 +395,7 @@ data_copy:
 		bh = bh->b_this_page;
 	}
 	if (!*err)
-		*err = block_commit_write(pagep[0], from, from + replaced_size);
+		*err = block_commit_write(&folio[0]->page, from, from + replaced_size);
 
 	if (unlikely(*err < 0))
 		goto repair_branches;
@@ -395,11 +405,11 @@ data_copy:
 	*err = ext4_jbd2_inode_add_write(handle, orig_inode,
 			(loff_t)orig_page_offset << PAGE_SHIFT, replaced_size);
 
-unlock_pages:
-	unlock_page(pagep[0]);
-	put_page(pagep[0]);
-	unlock_page(pagep[1]);
-	put_page(pagep[1]);
+unlock_folios:
+	folio_unlock(folio[0]);
+	folio_put(folio[0]);
+	folio_unlock(folio[1]);
+	folio_put(folio[1]);
 stop_journal:
 	ext4_journal_stop(handle);
 	if (*err == -ENOSPC &&
@@ -430,7 +440,7 @@ repair_branches:
 		*err = -EIO;
 	}
 	replaced_count = 0;
-	goto unlock_pages;
+	goto unlock_folios;
 }
 
 /**