nilfs2: add kernel-doc comments to nilfs_do_roll_forward()

Patch series "nilfs2: fix missing kernel-doc comments".

This commit adds kernel-doc style comments with complete parameter
descriptions for the function nilfs_do_roll_forward.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Yang Li <[email protected]>
Signed-off-by: Ryusuke Konishi <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: Yang Li

fs/nilfs2/recovery.c

@@ -563,6 +563,7 @@ static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
  * checkpoint
  * @nilfs: nilfs object
  * @sb: super block instance
+ * @root: NILFS root instance
  * @ri: pointer to a nilfs_recovery_info
  */
 static int nilfs_do_roll_forward(struct the_nilfs *nilfs,