u64 *extent_physical,
                               struct btrfs_device **extent_dev,
                               int *extent_mirror_num);
-static int scrub_setup_wr_ctx(struct scrub_ctx *sctx,
-                             struct scrub_wr_ctx *wr_ctx,
-                             struct btrfs_fs_info *fs_info,
+static int scrub_setup_wr_ctx(struct scrub_wr_ctx *wr_ctx,
                              struct btrfs_device *dev,
                              int is_dev_replace);
 static void scrub_free_wr_ctx(struct scrub_wr_ctx *wr_ctx);
        spin_lock_init(&sctx->stat_lock);
        init_waitqueue_head(&sctx->list_wait);
 
-       ret = scrub_setup_wr_ctx(sctx, &sctx->wr_ctx, fs_info,
+       ret = scrub_setup_wr_ctx(&sctx->wr_ctx,
                                 fs_info->dev_replace.tgtdev, is_dev_replace);
        if (ret) {
                scrub_free_ctx(sctx);
        btrfs_put_bbio(bbio);
 }
 
-static int scrub_setup_wr_ctx(struct scrub_ctx *sctx,
-                             struct scrub_wr_ctx *wr_ctx,
-                             struct btrfs_fs_info *fs_info,
+static int scrub_setup_wr_ctx(struct scrub_wr_ctx *wr_ctx,
                              struct btrfs_device *dev,
                              int is_dev_replace)
 {