btrfs: remove search_commit parameter from btrfs_lookup_csums_list()

All the callers of btrfs_lookup_csums_list() pass a value of 0 as the
"search_commit" parameter. So remove it and make the function behave as
to always search from the regular root.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/file-item.c

@@ -457,15 +457,12 @@ blk_status_t btrfs_lookup_bio_sums(struct btrfs_bio *bbio)
  * @start:		Logical address of target checksum range.
  * @end:		End offset (inclusive) of the target checksum range.
  * @list:		List for adding each checksum that was found.
- * @search_commit:	Indicate if the commit root of the @root should be used
- *			for the search.
  * @nowait:		Indicate if the search must be non-blocking or not.
  *
  * Return < 0 on error and 0 on success.
  */
 int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
-			    struct list_head *list, int search_commit,
-			    bool nowait)
+			    struct list_head *list, bool nowait)
 {
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_key key;
@@ -484,11 +481,6 @@ int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
 		return -ENOMEM;
 
 	path->nowait = nowait;
-	if (search_commit) {
-		path->skip_locking = 1;
-		path->reada = READA_FORWARD;
-		path->search_commit_root = 1;
-	}
 
 	key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
 	key.offset = start;

fs/btrfs/file-item.h

@@ -68,8 +68,7 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
 			     struct list_head *list, int search_commit,
 			     bool nowait);
 int btrfs_lookup_csums_list(struct btrfs_root *root, u64 start, u64 end,
-			    struct list_head *list, int search_commit,
-			    bool nowait);
+			    struct list_head *list, bool nowait);
 int btrfs_lookup_csums_bitmap(struct btrfs_root *root, struct btrfs_path *path,
 			      u64 start, u64 end, u8 *csum_buf,
 			      unsigned long *csum_bitmap);

fs/btrfs/inode.c

@@ -1745,7 +1745,7 @@ static noinline int csum_exist_in_range(struct btrfs_fs_info *fs_info,
 	LIST_HEAD(list);
 
 	ret = btrfs_lookup_csums_list(csum_root, bytenr, bytenr + num_bytes - 1,
-				      &list, 0, nowait);
+				      &list, nowait);
 	if (ret == 0 && list_empty(&list))
 		return 0;
 

fs/btrfs/relocation.c

@@ -4446,7 +4446,7 @@ int btrfs_reloc_clone_csums(struct btrfs_ordered_extent *ordered)
 
 	ret = btrfs_lookup_csums_list(csum_root, disk_bytenr,
 				      disk_bytenr + ordered->num_bytes - 1,
-				      &list, 0, false);
+				      &list, false);
 	if (ret)
 		return ret;
 

fs/btrfs/tree-log.c

@@ -797,7 +797,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
 
 			ret = btrfs_lookup_csums_list(root->log_root,
 						csum_start, csum_end - 1,
-						&ordered_sums, 0, false);
+						&ordered_sums, false);
 			if (ret)
 				goto out;
 			/*
@@ -4460,7 +4460,7 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
 		disk_bytenr += extent_offset;
 		ret = btrfs_lookup_csums_list(csum_root, disk_bytenr,
 					      disk_bytenr + extent_num_bytes - 1,
-					      &ordered_sums, 0, false);
+					      &ordered_sums, false);
 		if (ret)
 			goto out;
 
@@ -4655,7 +4655,7 @@ static int log_extent_csums(struct btrfs_trans_handle *trans,
 	csum_root = btrfs_csum_root(trans->fs_info, em->block_start);
 	ret = btrfs_lookup_csums_list(csum_root, em->block_start + csum_offset,
 				      em->block_start + csum_offset +
-				      csum_len - 1, &ordered_sums, 0, false);
+				      csum_len - 1, &ordered_sums, false);
 	if (ret)
 		return ret;