iomap: remove the iomap arguments to ->page_{prepare,done}

These aren't actually used by the only instance implementing the methods.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>

fs/gfs2/bmap.c

@@ -1002,7 +1002,7 @@ static void gfs2_write_unlock(struct inode *inode)
 }
 
 static int gfs2_iomap_page_prepare(struct inode *inode, loff_t pos,
-				   unsigned len, struct iomap *iomap)
+				   unsigned len)
 {
 	unsigned int blockmask = i_blocksize(inode) - 1;
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
@@ -1013,8 +1013,7 @@ static int gfs2_iomap_page_prepare(struct inode *inode, loff_t pos,
 }
 
 static void gfs2_iomap_page_done(struct inode *inode, loff_t pos,
-				 unsigned copied, struct page *page,
-				 struct iomap *iomap)
+				 unsigned copied, struct page *page)
 {
 	struct gfs2_trans *tr = current->journal_info;
 	struct gfs2_inode *ip = GFS2_I(inode);

fs/iomap/buffered-io.c

@@ -615,7 +615,7 @@ iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags,
 		return -EINTR;
 
 	if (page_ops && page_ops->page_prepare) {
-		status = page_ops->page_prepare(inode, pos, len, iomap);
+		status = page_ops->page_prepare(inode, pos, len);
 		if (status)
 			return status;
 	}
@@ -648,7 +648,7 @@ iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags,
 
 out_no_page:
 	if (page_ops && page_ops->page_done)
-		page_ops->page_done(inode, pos, 0, NULL, iomap);
+		page_ops->page_done(inode, pos, 0, NULL);
 	return status;
 }
 
@@ -724,7 +724,7 @@ static size_t iomap_write_end(struct inode *inode, loff_t pos, size_t len,
 	if (old_size < pos)
 		pagecache_isize_extended(inode, old_size, pos);
 	if (page_ops && page_ops->page_done)
-		page_ops->page_done(inode, pos, ret, page, iomap);
+		page_ops->page_done(inode, pos, ret, page);
 	put_page(page);
 
 	if (ret < len)

include/linux/iomap.h

@@ -126,10 +126,9 @@ static inline bool iomap_inline_data_valid(struct iomap *iomap)
  * associated page could not be obtained.
  */
 struct iomap_page_ops {
-	int (*page_prepare)(struct inode *inode, loff_t pos, unsigned len,
-			struct iomap *iomap);
+	int (*page_prepare)(struct inode *inode, loff_t pos, unsigned len);
 	void (*page_done)(struct inode *inode, loff_t pos, unsigned copied,
-			struct page *page, struct iomap *iomap);
+			struct page *page);
 };
 
 /*