iomap: move internal declarations into fs/iomap/

Move internal function declarations out of fs/internal.h into
include/linux/iomap.h so that our transition is complete.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

include/linux/iomap.h

@@ -122,6 +122,16 @@ struct iomap_ops {
 			ssize_t written, unsigned flags, struct iomap *iomap);
 };
 
+/*
+ * Main iomap iterator function.
+ */
+typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
+		void *data, struct iomap *iomap);
+
+loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
+		unsigned flags, const struct iomap_ops *ops, void *data,
+		iomap_actor_t actor);
+
 /*
  * Structure allocate for each page when block size < PAGE_SIZE to track
  * sub-page uptodate status and I/O completions.