Fixes the following W=1 kernel build warning(s):

fs/ext2/balloc.c:203: warning: Excess function parameter 'rb_root' description 
in '__rsv_window_dump'
fs/ext2/balloc.c:294: warning: Excess function parameter 'rb_root' description 
in 'search_reserve_window'
fs/ext2/balloc.c:878: warning: Excess function parameter 'rsv' description in 
'alloc_new_reservation'

Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Wang Hai <wangha...@huawei.com>
---
 fs/ext2/balloc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index fa9c951d3471..1f3f4326bf3c 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -189,7 +189,7 @@ static void group_adjust_blocks(struct super_block *sb, int 
group_no,
 
 /**
  * __rsv_window_dump() -- Dump the filesystem block allocation reservation map
- * @rb_root:           root of per-filesystem reservation rb tree
+ * @root:              root of per-filesystem reservation rb tree
  * @verbose:           verbose mode
  * @fn:                        function which wishes to dump the reservation 
map
  *
@@ -282,7 +282,7 @@ goal_in_my_reservation(struct ext2_reserve_window *rsv, 
ext2_grpblk_t grp_goal,
 
 /**
  * search_reserve_window()
- * @rb_root:           root of reservation tree
+ * @root:              root of reservation tree
  * @goal:              target allocation block
  *
  * Find the reserved window which includes the goal, or the previous one
@@ -859,7 +859,7 @@ static int find_next_reservable_window(
  *
  *     failed: we failed to find a reservation window in this group
  *
- *     @rsv: the reservation
+ *     @my_rsv: the reservation
  *
  *     @grp_goal: The goal (group-relative).  It is where the search for a
  *             free reservable space should start from.
-- 
2.17.1

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