gfs2: Convert gfs2_page_add_databufs to folios

Convert gfs2_page_add_databufs() to folios and rename it to
gfs2_trans_add_databufs().

Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/aops.c

@@ -37,10 +37,10 @@
 #include "aops.h"
 
 
-void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
+void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio,
 			     unsigned int from, unsigned int len)
 {
-	struct buffer_head *head = page_buffers(page);
+	struct buffer_head *head = folio_buffers(folio);
 	unsigned int bsize = head->b_size;
 	struct buffer_head *bh;
 	unsigned int to = from + len;
@@ -134,7 +134,7 @@ static int __gfs2_jdata_writepage(struct page *page, struct writeback_control *w
 			create_empty_buffers(page, inode->i_sb->s_blocksize,
 					     BIT(BH_Dirty)|BIT(BH_Uptodate));
 		}
-		gfs2_page_add_databufs(ip, page, 0, PAGE_SIZE);
+		gfs2_trans_add_databufs(ip, page_folio(page), 0, PAGE_SIZE);
 	}
 	return gfs2_write_jdata_page(page, wbc);
 }

fs/gfs2/aops.h

@@ -9,7 +9,7 @@
 #include "incore.h"
 
 extern void adjust_fs_space(struct inode *inode);
-extern void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
+extern void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio,
 				    unsigned int from, unsigned int len);
 
 #endif /* __AOPS_DOT_H__ */

fs/gfs2/bmap.c

@@ -985,7 +985,7 @@ static void gfs2_iomap_put_folio(struct inode *inode, loff_t pos,
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
 
 	if (!gfs2_is_stuffed(ip))
-		gfs2_page_add_databufs(ip, &folio->page, offset_in_page(pos),
+		gfs2_trans_add_databufs(ip, folio, offset_in_folio(folio, pos),
 					copied);
 
 	folio_unlock(folio);