ceph: fix kerneldoc copypasta over ceph_start_io_direct

Signed-off-by: Jeff Layton <[e-mail]>
Signed-off-by: Ilya Dryomov <[e-mail]>

fs/ceph/io.c

···
 }
 
 /**
- * ceph_end_io_direct - declare the file is being used for direct i/o
+ * ceph_start_io_direct - declare the file is being used for direct i/o
  * @inode: file inode
  *
  * Declare that a direct I/O operation is about to start, and ensure