[PATCH] Btrfs: remove unused trans in read_block_for_search

[Liu Bo <bo.li.liu@oracle.com>]

@trans is not used at all, this removes it.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
 fs/btrfs/ctree.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index a426dc8..dd8014a 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2437,10 +2437,9 @@ noinline void btrfs_unlock_up_safe(struct btrfs_path *path, int level)
  * reada.  -EAGAIN is returned and the search must be repeated.
  */
 static int
-read_block_for_search(struct btrfs_trans_handle *trans,
-		       struct btrfs_root *root, struct btrfs_path *p,
-		       struct extent_buffer **eb_ret, int level, int slot,
-		       struct btrfs_key *key, u64 time_seq)
+read_block_for_search(struct btrfs_root *root, struct btrfs_path *p,
+		      struct extent_buffer **eb_ret, int level, int slot,
+		      struct btrfs_key *key, u64 time_seq)
 {
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	u64 blocknr;
@@ -2870,8 +2869,8 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
 				goto done;
 			}
 
-			err = read_block_for_search(trans, root, p,
-						    &b, level, slot, key, 0);
+			err = read_block_for_search(root, p, &b, level,
+						    slot, key, 0);
 			if (err == -EAGAIN)
 				goto again;
 			if (err) {
@@ -3014,7 +3013,7 @@ int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
 				goto done;
 			}
 
-			err = read_block_for_search(NULL, root, p, &b, level,
+			err = read_block_for_search(root, p, &b, level,
 						    slot, key, time_seq);
 			if (err == -EAGAIN)
 				goto again;
@@ -5784,7 +5783,7 @@ int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
 
 		next = c;
 		next_rw_lock = path->locks[level];
-		ret = read_block_for_search(NULL, root, path, &next, level,
+		ret = read_block_for_search(root, path, &next, level,
 					    slot, &key, 0);
 		if (ret == -EAGAIN)
 			goto again;
@@ -5834,7 +5833,7 @@ int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
 		if (!level)
 			break;
 
-		ret = read_block_for_search(NULL, root, path, &next, level,
+		ret = read_block_for_search(root, path, &next, level,
 					    0, &key, 0);
 		if (ret == -EAGAIN)
 			goto again;
-- 
2.5.5