[PATCH v13 092/137] iomap: Convert iomap_page_create to take a folio

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

This function already assumed it was being passed a head page, so
just formalise that.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/iomap/buffered-io.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 089e89d4c74b..257b15019ab6 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -42,11 +42,10 @@ static inline struct iomap_page *to_iomap_page(struct folio *folio)
 static struct bio_set iomap_ioend_bioset;
 
 static struct iomap_page *
-iomap_page_create(struct inode *inode, struct page *page)
+iomap_page_create(struct inode *inode, struct folio *folio)
 {
-	struct folio *folio = page_folio(page);
 	struct iomap_page *iop = to_iomap_page(folio);
-	unsigned int nr_blocks = i_blocks_per_page(inode, page);
+	unsigned int nr_blocks = i_blocks_per_folio(inode, folio);
 
 	if (iop || nr_blocks <= 1)
 		return iop;
@@ -54,9 +53,9 @@ iomap_page_create(struct inode *inode, struct page *page)
 	iop = kzalloc(struct_size(iop, uptodate, BITS_TO_LONGS(nr_blocks)),
 			GFP_NOFS | __GFP_NOFAIL);
 	spin_lock_init(&iop->uptodate_lock);
-	if (PageUptodate(page))
+	if (folio_uptodate(folio))
 		bitmap_fill(iop->uptodate, nr_blocks);
-	attach_page_private(page, iop);
+	folio_attach_private(folio, iop);
 	return iop;
 }
 
@@ -235,7 +234,8 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
 {
 	struct iomap_readpage_ctx *ctx = data;
 	struct page *page = ctx->cur_page;
-	struct iomap_page *iop = iomap_page_create(inode, page);
+	struct folio *folio = page_folio(page);
+	struct iomap_page *iop = iomap_page_create(inode, folio);
 	bool same_page = false, is_contig = false;
 	loff_t orig_pos = pos;
 	unsigned poff, plen;
@@ -547,7 +547,8 @@ static int
 __iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, int flags,
 		struct page *page, struct iomap *srcmap)
 {
-	struct iomap_page *iop = iomap_page_create(inode, page);
+	struct folio *folio = page_folio(page);
+	struct iomap_page *iop = iomap_page_create(inode, folio);
 	loff_t block_size = i_blocksize(inode);
 	loff_t block_start = round_down(pos, block_size);
 	loff_t block_end = round_up(pos + len, block_size);
@@ -955,6 +956,7 @@ iomap_page_mkwrite_actor(struct inode *inode, loff_t pos, loff_t length,
 		void *data, struct iomap *iomap, struct iomap *srcmap)
 {
 	struct page *page = data;
+	struct folio *folio = page_folio(page);
 	int ret;
 
 	if (iomap->flags & IOMAP_F_BUFFER_HEAD) {
@@ -964,7 +966,7 @@ iomap_page_mkwrite_actor(struct inode *inode, loff_t pos, loff_t length,
 		block_commit_write(page, 0, length);
 	} else {
 		WARN_ON_ONCE(!PageUptodate(page));
-		iomap_page_create(inode, page);
+		iomap_page_create(inode, folio);
 		set_page_dirty(page);
 	}
 
-- 
2.30.2