block,fs: untangle fs.h and blk_types.h

Nothing in fs.h should require blk_types.h to be included.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 5b0a9b7..8533e9d 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -28,7 +28,6 @@
 #include <linux/uidgid.h>
 #include <linux/lockdep.h>
 #include <linux/percpu-rwsem.h>
-#include <linux/blk_types.h>
 #include <linux/workqueue.h>
 #include <linux/percpu-rwsem.h>
 #include <linux/delayed_call.h>
@@ -38,6 +37,7 @@
 
 struct backing_dev_info;
 struct bdi_writeback;
+struct bio;
 struct export_operations;
 struct hd_geometry;
 struct iovec;