iomap: Rename page_prepare handler to get_folio

The ->page_prepare() handler in struct iomap_page_ops is now somewhat
misnamed, so rename it to ->get_folio().
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

fs/gfs2/bmap.c

@@ -957,7 +957,7 @@ static int __gfs2_iomap_get(struct inode *inode, loff_t pos, loff_t length,
 }
 
 static struct folio *
-gfs2_iomap_page_prepare(struct iomap_iter *iter, loff_t pos, unsigned len)
+gfs2_iomap_get_folio(struct iomap_iter *iter, loff_t pos, unsigned len)
 {
 	struct inode *inode = iter->inode;
 	unsigned int blockmask = i_blocksize(inode) - 1;
@@ -998,7 +998,7 @@ static void gfs2_iomap_put_folio(struct inode *inode, loff_t pos,
 }
 
 static const struct iomap_page_ops gfs2_iomap_page_ops = {
-	.page_prepare = gfs2_iomap_page_prepare,
+	.get_folio = gfs2_iomap_get_folio,
 	.put_folio = gfs2_iomap_put_folio,
 };
 
@@ -1291,7 +1291,7 @@ int gfs2_alloc_extent(struct inode *inode, u64 lblock, u64 *dblock,
 /*
  * NOTE: Never call gfs2_block_zero_range with an open transaction because it
  * uses iomap write to perform its actions, which begin their own transactions
- * (iomap_begin, page_prepare, etc.)
+ * (iomap_begin, get_folio, etc.)
  */
 static int gfs2_block_zero_range(struct inode *inode, loff_t from,
 				 unsigned int length)

fs/iomap/buffered-io.c

@@ -607,8 +607,8 @@ static struct folio *__iomap_get_folio(struct iomap_iter *iter, loff_t pos,
 {
 	const struct iomap_page_ops *page_ops = iter->iomap.page_ops;
 
-	if (page_ops && page_ops->page_prepare)
-		return page_ops->page_prepare(iter, pos, len);
+	if (page_ops && page_ops->get_folio)
+		return page_ops->get_folio(iter, pos, len);
 	else
 		return iomap_get_folio(iter, pos);
 }

include/linux/iomap.h

@@ -126,17 +126,17 @@ static inline bool iomap_inline_data_valid(const struct iomap *iomap)
 }
 
 /*
- * When a filesystem sets page_ops in an iomap mapping it returns, page_prepare
+ * When a filesystem sets page_ops in an iomap mapping it returns, get_folio
  * and put_folio will be called for each folio written to.  This only applies
  * to buffered writes as unbuffered writes will not typically have folios
  * associated with them.
  *
- * When page_prepare succeeds, put_folio will always be called to do any
+ * When get_folio succeeds, put_folio will always be called to do any
  * cleanup work necessary.  put_folio is responsible for unlocking and putting
  * @folio.
  */
 struct iomap_page_ops {
-	struct folio *(*page_prepare)(struct iomap_iter *iter, loff_t pos,
+	struct folio *(*get_folio)(struct iomap_iter *iter, loff_t pos,
 			unsigned len);
 	void (*put_folio)(struct inode *inode, loff_t pos, unsigned copied,
 			struct folio *folio);