Merge tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache

Pull folio updates from Matthew Wilcox:

 - Rewrite how munlock works to massively reduce the contention on
   i_mmap_rwsem (Hugh Dickins):

     https://lore.kernel.org/linux-mm/8e4356d-9622-a7f0-b2c-f116b5f2efea@google.com/

 - Sort out the page refcount mess for ZONE_DEVICE pages (Christoph
   Hellwig):

     https://lore.kernel.org/linux-mm/20220210072828.2930359-1-hch@lst.de/

 - Convert GUP to use folios and make pincount available for order-1
   pages. (Matthew Wilcox)

 - Convert a few more truncation functions to use folios (Matthew
   Wilcox)

 - Convert page_vma_mapped_walk to use PFNs instead of pages (Matthew
   Wilcox)

 - Convert rmap_walk to use folios (Matthew Wilcox)

 - Convert most of shrink_page_list() to use a folio (Matthew Wilcox)

 - Add support for creating large folios in readahead (Matthew Wilcox)

* tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache: (114 commits)
  mm/damon: minor cleanup for damon_pa_young
  selftests/vm/transhuge-stress: Support file-backed PMD folios
  mm/filemap: Support VM_HUGEPAGE for file mappings
  mm/readahead: Switch to page_cache_ra_order
  mm/readahead: Align file mappings for non-DAX
  mm/readahead: Add large folio readahead
  mm: Support arbitrary THP sizes
  mm: Make large folios depend on THP
  mm: Fix READ_ONLY_THP warning
  mm/filemap: Allow large folios to be added to the page cache
  mm: Turn can_split_huge_page() into can_split_folio()
  mm/vmscan: Convert pageout() to take a folio
  mm/vmscan: Turn page_check_references() into folio_check_references()
  mm/vmscan: Account large folios correctly
  mm/vmscan: Optimise shrink_page_list for non-PMD-sized folios
  mm/vmscan: Free non-shmem folios without splitting them
  mm/rmap: Constify the rmap_walk_control argument
  mm/rmap: Convert rmap_walk() to take a folio
  mm: Turn page_anon_vma() into folio_anon_vma()
  mm/rmap: Turn page_lock_anon_vma_read() into folio_lock_anon_vma_read()
  ...

2 files changed, 4 insertions, 11 deletions

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 6357c3580d07..6418083901d4 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -155,11 +155,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
 				struct page *old_page, struct page *new_page)
 {
 	struct mm_struct *mm = vma->vm_mm;
-	struct page_vma_mapped_walk pvmw = {
-		.page = compound_head(old_page),
-		.vma = vma,
-		.address = addr,
-	};
+	DEFINE_FOLIO_VMA_WALK(pvmw, page_folio(old_page), vma, addr, 0);
 	int err;
 	struct mmu_notifier_range range;
 
@@ -173,7 +169,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
 			return err;
 	}
 
-	/* For try_to_free_swap() and munlock_vma_page() below */
+	/* For try_to_free_swap() below */
 	lock_page(old_page);
 
 	mmu_notifier_invalidate_range_start(&range);
@@ -201,13 +197,10 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
 		set_pte_at_notify(mm, addr, pvmw.pte,
 				  mk_pte(new_page, vma->vm_page_prot));
 
-	page_remove_rmap(old_page, false);
+	page_remove_rmap(old_page, vma, false);
 	if (!page_mapped(old_page))
 		try_to_free_swap(old_page);
 	page_vma_mapped_walk_done(&pvmw);
-
-	if ((vma->vm_flags & VM_LOCKED) && !PageCompound(old_page))
-		munlock_vma_page(old_page);
 	put_page(old_page);
 
 	err = 0;
diff --git a/kernel/futex/core.c b/kernel/futex/core.c
index 51dd822a8060..b22ef1efe751 100644
--- a/kernel/futex/core.c
+++ b/kernel/futex/core.c
@@ -302,7 +302,7 @@ again:
 	 * found it, but truncated or holepunched or subjected to
 	 * invalidate_complete_page2 before we got the page lock (also
 	 * cases which we are happy to fail).  And we hold a reference,
-	 * so refcount care in invalidate_complete_page's remove_mapping
+	 * so refcount care in invalidate_inode_page's remove_mapping
 	 * prevents drop_caches from setting mapping to NULL beneath us.
 	 *
 	 * The case we do have to guard against is when memory pressure made