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>

fs/ocfs2/buffer_head_io.c

@@ -26,6 +26,7 @@
 #include <linux/fs.h>
 #include <linux/types.h>
 #include <linux/highmem.h>
+#include <linux/bio.h>
 
 #include <cluster/masklog.h>