[PATCH v2 11/11] ntfs3: Convert ni_readpage_cmpr() to take a folio

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

We still use an array of pages for the decompression, but this removes
a few calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/ntfs3/frecord.c | 13 +++++++------
 fs/ntfs3/inode.c   |  2 +-
 fs/ntfs3/ntfs_fs.h |  2 +-
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index b9b3f1bf1bc4..8b1139fd5359 100644
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -2085,12 +2085,12 @@ int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
  * When decompressing, we typically obtain more than one page per reference.
  * We inject the additional pages into the page cache.
  */
-int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page)
+int ni_readpage_cmpr(struct ntfs_inode *ni, struct folio *folio)
 {
 	int err;
 	struct ntfs_sb_info *sbi = ni->mi.sbi;
-	struct address_space *mapping = page->mapping;
-	pgoff_t index = page->index;
+	struct address_space *mapping = folio->mapping;
+	pgoff_t index = folio->index;
 	u64 frame_vbo, vbo = (u64)index << PAGE_SHIFT;
 	struct page **pages = NULL; /* Array of at most 16 pages. stack? */
 	u8 frame_bits;
@@ -2100,7 +2100,8 @@ int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page)
 	struct page *pg;
 
 	if (vbo >= i_size_read(&ni->vfs_inode)) {
-		SetPageUptodate(page);
+		folio_zero_range(folio, 0, folio_size(folio));
+		folio_mark_uptodate(folio);
 		err = 0;
 		goto out;
 	}
@@ -2124,7 +2125,7 @@ int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page)
 		goto out;
 	}
 
-	pages[idx] = page;
+	pages[idx] = &folio->page;
 	index = frame_vbo >> PAGE_SHIFT;
 	gfp_mask = mapping_gfp_mask(mapping);
 
@@ -2154,7 +2155,7 @@ int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page)
 out:
 	/* At this point, err contains 0 or -EIO depending on the "critical" page. */
 	kfree(pages);
-	unlock_page(page);
+	folio_unlock(folio);
 
 	return err;
 }
diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index 4791a002500b..ef32be41b860 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -727,7 +727,7 @@ static int ntfs_read_folio(struct file *file, struct folio *folio)
 
 	if (is_compressed(ni)) {
 		ni_lock(ni);
-		err = ni_readpage_cmpr(ni, &folio->page);
+		err = ni_readpage_cmpr(ni, folio);
 		ni_unlock(ni);
 		return err;
 	}
diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index fbd14776bd28..3b50c4357a46 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -577,7 +577,7 @@ int ni_write_inode(struct inode *inode, int sync, const char *hint);
 #define _ni_write_inode(i, w) ni_write_inode(i, w, __func__)
 int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
 	      __u64 vbo, __u64 len);
-int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page);
+int ni_readpage_cmpr(struct ntfs_inode *ni, struct folio *folio);
 int ni_decompress_file(struct ntfs_inode *ni);
 int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
 		  u32 pages_per_frame);
-- 
2.43.0