Merge tag 'folio-5.19' of git://git.infradead.org/users/willy/pagecache

Pull page cache updates from Matthew Wilcox:

 - Appoint myself page cache maintainer

 - Fix how scsicam uses the page cache

 - Use the memalloc_nofs_save() API to replace AOP_FLAG_NOFS

 - Remove the AOP flags entirely

 - Remove pagecache_write_begin() and pagecache_write_end()

 - Documentation updates

 - Convert several address_space operations to use folios:
     - is_dirty_writeback
     - readpage becomes read_folio
     - releasepage becomes release_folio
     - freepage becomes free_folio

 - Change filler_t to require a struct file pointer be the first
   argument like ->read_folio

* tag 'folio-5.19' of git://git.infradead.org/users/willy/pagecache: (107 commits)
  nilfs2: Fix some kernel-doc comments
  Appoint myself page cache maintainer
  fs: Remove aops->freepage
  secretmem: Convert to free_folio
  nfs: Convert to free_folio
  orangefs: Convert to free_folio
  fs: Add free_folio address space operation
  fs: Convert drop_buffers() to use a folio
  fs: Change try_to_free_buffers() to take a folio
  jbd2: Convert release_buffer_page() to use a folio
  jbd2: Convert jbd2_journal_try_to_free_buffers to take a folio
  reiserfs: Convert release_buffer_page() to use a folio
  fs: Remove last vestiges of releasepage
  ubifs: Convert to release_folio
  reiserfs: Convert to release_folio
  orangefs: Convert to release_folio
  ocfs2: Convert to release_folio
  nilfs2: Remove comment about releasepage
  nfs: Convert to release_folio
  jfs: Convert to release_folio
  ...

3 files changed, 20 insertions, 19 deletions

diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 15806eeae217..a4fcdc7927ca 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -115,7 +115,6 @@ static int ntfs_extend_initialized_size(struct file *file,
 	for (;;) {
 		u32 zerofrom, len;
 		struct page *page;
-		void *fsdata;
 		u8 bits;
 		CLST vcn, lcn, clen;
 
@@ -157,16 +156,14 @@ static int ntfs_extend_initialized_size(struct file *file,
 		if (pos + len > new_valid)
 			len = new_valid - pos;
 
-		err = pagecache_write_begin(file, mapping, pos, len, 0, &page,
-					    &fsdata);
+		err = ntfs_write_begin(file, mapping, pos, len, &page, NULL);
 		if (err)
 			goto out;
 
 		zero_user_segment(page, zerofrom, PAGE_SIZE);
 
 		/* This function in any case puts page. */
-		err = pagecache_write_end(file, mapping, pos, len, len, page,
-					  fsdata);
+		err = ntfs_write_end(file, mapping, pos, len, len, page, NULL);
 		if (err < 0)
 			goto out;
 		pos += len;
diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 9eab11e3b034..74f60c457f28 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -676,8 +676,9 @@ static sector_t ntfs_bmap(struct address_space *mapping, sector_t block)
 	return generic_block_bmap(mapping, block, ntfs_get_block_bmap);
 }
 
-static int ntfs_readpage(struct file *file, struct page *page)
+static int ntfs_read_folio(struct file *file, struct folio *folio)
 {
+	struct page *page = &folio->page;
 	int err;
 	struct address_space *mapping = page->mapping;
 	struct inode *inode = mapping->host;
@@ -701,7 +702,7 @@ static int ntfs_readpage(struct file *file, struct page *page)
 	}
 
 	/* Normal + sparse files. */
-	return mpage_readpage(page, ntfs_get_block);
+	return mpage_read_folio(folio, ntfs_get_block);
 }
 
 static void ntfs_readahead(struct readahead_control *rac)
@@ -861,9 +862,8 @@ static int ntfs_get_block_write_begin(struct inode *inode, sector_t vbn,
 				  bh_result, create, GET_BLOCK_WRITE_BEGIN);
 }
 
-static int ntfs_write_begin(struct file *file, struct address_space *mapping,
-			    loff_t pos, u32 len, u32 flags, struct page **pagep,
-			    void **fsdata)
+int ntfs_write_begin(struct file *file, struct address_space *mapping,
+		     loff_t pos, u32 len, struct page **pagep, void **fsdata)
 {
 	int err;
 	struct inode *inode = mapping->host;
@@ -872,7 +872,7 @@ static int ntfs_write_begin(struct file *file, struct address_space *mapping,
 	*pagep = NULL;
 	if (is_resident(ni)) {
 		struct page *page = grab_cache_page_write_begin(
-			mapping, pos >> PAGE_SHIFT, flags);
+			mapping, pos >> PAGE_SHIFT);
 
 		if (!page) {
 			err = -ENOMEM;
@@ -894,7 +894,7 @@ static int ntfs_write_begin(struct file *file, struct address_space *mapping,
 			goto out;
 	}
 
-	err = block_write_begin(mapping, pos, len, flags, pagep,
+	err = block_write_begin(mapping, pos, len, pagep,
 				ntfs_get_block_write_begin);
 
 out:
@@ -904,10 +904,9 @@ out:
 /*
  * ntfs_write_end - Address_space_operations::write_end.
  */
-static int ntfs_write_end(struct file *file, struct address_space *mapping,
-			  loff_t pos, u32 len, u32 copied, struct page *page,
-			  void *fsdata)
-
+int ntfs_write_end(struct file *file, struct address_space *mapping,
+		   loff_t pos, u32 len, u32 copied, struct page *page,
+		   void *fsdata)
 {
 	struct inode *inode = mapping->host;
 	struct ntfs_inode *ni = ntfs_i(inode);
@@ -975,7 +974,7 @@ int reset_log_file(struct inode *inode)
 
 		len = pos + PAGE_SIZE > log_size ? (log_size - pos) : PAGE_SIZE;
 
-		err = block_write_begin(mapping, pos, len, 0, &page,
+		err = block_write_begin(mapping, pos, len, &page,
 					ntfs_get_block_write_begin);
 		if (err)
 			goto out;
@@ -1942,7 +1941,7 @@ const struct inode_operations ntfs_link_inode_operations = {
 };
 
 const struct address_space_operations ntfs_aops = {
-	.readpage	= ntfs_readpage,
+	.read_folio	= ntfs_read_folio,
 	.readahead	= ntfs_readahead,
 	.writepage	= ntfs_writepage,
 	.writepages	= ntfs_writepages,
@@ -1954,7 +1953,7 @@ const struct address_space_operations ntfs_aops = {
 };
 
 const struct address_space_operations ntfs_aops_cmpr = {
-	.readpage	= ntfs_readpage,
+	.read_folio	= ntfs_read_folio,
 	.readahead	= ntfs_readahead,
 };
 // clang-format on
diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index fb825059d488..8de129a6419b 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -689,6 +689,11 @@ int ntfs_set_size(struct inode *inode, u64 new_size);
 int reset_log_file(struct inode *inode);
 int ntfs_get_block(struct inode *inode, sector_t vbn,
 		   struct buffer_head *bh_result, int create);
+int ntfs_write_begin(struct file *file, struct address_space *mapping,
+		     loff_t pos, u32 len, struct page **pagep, void **fsdata);
+int ntfs_write_end(struct file *file, struct address_space *mapping,
+		   loff_t pos, u32 len, u32 copied, struct page *page,
+		   void *fsdata);
 int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc);
 int ntfs_sync_inode(struct inode *inode);
 int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,