int ret;
 
        down_read(&bmap->b_sem);
-       ret = (*bmap->b_ops->bop_lookup)(bmap, key, level, ptrp);
+       ret = bmap->b_ops->bop_lookup(bmap, key, level, ptrp);
        if (ret < 0)
                goto out;
        if (bmap->b_pops->bpop_translate != NULL) {
-               ret = (*bmap->b_pops->bpop_translate)(bmap, *ptrp, &ptr);
+               ret = bmap->b_pops->bpop_translate(bmap, *ptrp, &ptr);
                if (ret < 0)
                        goto out;
                *ptrp = ptr;
        int ret, n;
 
        if (bmap->b_ops->bop_check_insert != NULL) {
-               ret = (*bmap->b_ops->bop_check_insert)(bmap, key);
+               ret = bmap->b_ops->bop_check_insert(bmap, key);
                if (ret > 0) {
-                       n = (*bmap->b_ops->bop_gather_data)(
+                       n = bmap->b_ops->bop_gather_data(
                                bmap, keys, ptrs, NILFS_BMAP_SMALL_HIGH + 1);
                        if (n < 0)
                                return n;
                        return ret;
        }
 
-       return (*bmap->b_ops->bop_insert)(bmap, key, ptr);
+       return bmap->b_ops->bop_insert(bmap, key, ptr);
 }
 
 /**
        int ret, n;
 
        if (bmap->b_ops->bop_check_delete != NULL) {
-               ret = (*bmap->b_ops->bop_check_delete)(bmap, key);
+               ret = bmap->b_ops->bop_check_delete(bmap, key);
                if (ret > 0) {
-                       n = (*bmap->b_ops->bop_gather_data)(
+                       n = bmap->b_ops->bop_gather_data(
                                bmap, keys, ptrs, NILFS_BMAP_LARGE_LOW + 1);
                        if (n < 0)
                                return n;
                        return ret;
        }
 
-       return (*bmap->b_ops->bop_delete)(bmap, key);
+       return bmap->b_ops->bop_delete(bmap, key);
 }
 
 int nilfs_bmap_last_key(struct nilfs_bmap *bmap, unsigned long *key)
        int ret;
 
        down_read(&bmap->b_sem);
-       ret = (*bmap->b_ops->bop_last_key)(bmap, &lastkey);
+       ret = bmap->b_ops->bop_last_key(bmap, &lastkey);
        if (!ret)
                *key = lastkey;
        up_read(&bmap->b_sem);
        __u64 lastkey;
        int ret;
 
-       ret = (*bmap->b_ops->bop_last_key)(bmap, &lastkey);
+       ret = bmap->b_ops->bop_last_key(bmap, &lastkey);
        if (ret < 0) {
                if (ret == -ENOENT)
                        ret = 0;
                ret = nilfs_bmap_do_delete(bmap, lastkey);
                if (ret < 0)
                        return ret;
-               ret = (*bmap->b_ops->bop_last_key)(bmap, &lastkey);
+               ret = bmap->b_ops->bop_last_key(bmap, &lastkey);
                if (ret < 0) {
                        if (ret == -ENOENT)
                                ret = 0;
 {
        down_write(&bmap->b_sem);
        if (bmap->b_ops->bop_clear != NULL)
-               (*bmap->b_ops->bop_clear)(bmap);
+               bmap->b_ops->bop_clear(bmap);
        up_write(&bmap->b_sem);
 }
 
        int ret;
 
        down_write(&bmap->b_sem);
-       ret = (*bmap->b_ops->bop_propagate)(bmap, bh);
+       ret = bmap->b_ops->bop_propagate(bmap, bh);
        up_write(&bmap->b_sem);
        return ret;
 }
                                     struct list_head *listp)
 {
        if (bmap->b_ops->bop_lookup_dirty_buffers != NULL)
-               (*bmap->b_ops->bop_lookup_dirty_buffers)(bmap, listp);
+               bmap->b_ops->bop_lookup_dirty_buffers(bmap, listp);
 }
 
 /**
        int ret;
 
        down_write(&bmap->b_sem);
-       ret = (*bmap->b_ops->bop_assign)(bmap, bh, blocknr, binfo);
+       ret = bmap->b_ops->bop_assign(bmap, bh, blocknr, binfo);
        up_write(&bmap->b_sem);
        return ret;
 }
                return 0;
 
        down_write(&bmap->b_sem);
-       ret = (*bmap->b_ops->bop_mark)(bmap, key, level);
+       ret = bmap->b_ops->bop_mark(bmap, key, level);
        up_write(&bmap->b_sem);
        return ret;
 }
 {
        int ret;
 
-       ret = (*bmap->b_pops->bpop_prepare_end_ptr)(bmap, oldreq);
+       ret = bmap->b_pops->bpop_prepare_end_ptr(bmap, oldreq);
        if (ret < 0)
                return ret;
-       ret = (*bmap->b_pops->bpop_prepare_alloc_ptr)(bmap, newreq);
+       ret = bmap->b_pops->bpop_prepare_alloc_ptr(bmap, newreq);
        if (ret < 0)
-               (*bmap->b_pops->bpop_abort_end_ptr)(bmap, oldreq);
+               bmap->b_pops->bpop_abort_end_ptr(bmap, oldreq);
 
        return ret;
 }
                              union nilfs_bmap_ptr_req *oldreq,
                              union nilfs_bmap_ptr_req *newreq)
 {
-       (*bmap->b_pops->bpop_commit_end_ptr)(bmap, oldreq);
-       (*bmap->b_pops->bpop_commit_alloc_ptr)(bmap, newreq);
+       bmap->b_pops->bpop_commit_end_ptr(bmap, oldreq);
+       bmap->b_pops->bpop_commit_alloc_ptr(bmap, newreq);
 }
 
 void nilfs_bmap_abort_update(struct nilfs_bmap *bmap,
                             union nilfs_bmap_ptr_req *oldreq,
                             union nilfs_bmap_ptr_req *newreq)
 {
-       (*bmap->b_pops->bpop_abort_end_ptr)(bmap, oldreq);
-       (*bmap->b_pops->bpop_abort_alloc_ptr)(bmap, newreq);
+       bmap->b_pops->bpop_abort_end_ptr(bmap, oldreq);
+       bmap->b_pops->bpop_abort_alloc_ptr(bmap, newreq);
 }
 
 static int nilfs_bmap_translate_v(const struct nilfs_bmap *bmap, __u64 ptr,
 
        /* allocate a new ptr for data block */
        if (btree->bt_ops->btop_find_target != NULL)
                path[level].bp_newreq.bpr_ptr =
-                       (*btree->bt_ops->btop_find_target)(btree, path, key);
+                       btree->bt_ops->btop_find_target(btree, path, key);
 
-       ret = (*btree->bt_bmap.b_pops->bpop_prepare_alloc_ptr)(
+       ret = btree->bt_bmap.b_pops->bpop_prepare_alloc_ptr(
                &btree->bt_bmap, &path[level].bp_newreq);
        if (ret < 0)
                goto err_out_data;
                /* split */
                path[level].bp_newreq.bpr_ptr =
                        path[level - 1].bp_newreq.bpr_ptr + 1;
-               ret = (*btree->bt_bmap.b_pops->bpop_prepare_alloc_ptr)(
+               ret = btree->bt_bmap.b_pops->bpop_prepare_alloc_ptr(
                        &btree->bt_bmap, &path[level].bp_newreq);
                if (ret < 0)
                        goto err_out_child_node;
 
        /* grow */
        path[level].bp_newreq.bpr_ptr = path[level - 1].bp_newreq.bpr_ptr + 1;
-       ret = (*btree->bt_bmap.b_pops->bpop_prepare_alloc_ptr)(
+       ret = btree->bt_bmap.b_pops->bpop_prepare_alloc_ptr(
                &btree->bt_bmap, &path[level].bp_newreq);
        if (ret < 0)
                goto err_out_child_node;
 
        /* error */
  err_out_curr_node:
-       (*btree->bt_bmap.b_pops->bpop_abort_alloc_ptr)(&btree->bt_bmap,
-                                                      &path[level].bp_newreq);
+       btree->bt_bmap.b_pops->bpop_abort_alloc_ptr(&btree->bt_bmap,
+                                                   &path[level].bp_newreq);
  err_out_child_node:
        for (level--; level > NILFS_BTREE_LEVEL_DATA; level--) {
                nilfs_bmap_delete_block(&btree->bt_bmap, path[level].bp_sib_bh);
-               (*btree->bt_bmap.b_pops->bpop_abort_alloc_ptr)(
+               btree->bt_bmap.b_pops->bpop_abort_alloc_ptr(
                        &btree->bt_bmap, &path[level].bp_newreq);
 
        }
 
-       (*btree->bt_bmap.b_pops->bpop_abort_alloc_ptr)(&btree->bt_bmap,
+       btree->bt_bmap.b_pops->bpop_abort_alloc_ptr(&btree->bt_bmap,
                                                       &path[level].bp_newreq);
  err_out_data:
        *levelp = level;
        set_buffer_nilfs_volatile((struct buffer_head *)((unsigned long)ptr));
        ptr = path[NILFS_BTREE_LEVEL_DATA].bp_newreq.bpr_ptr;
        if (btree->bt_ops->btop_set_target != NULL)
-               (*btree->bt_ops->btop_set_target)(btree, key, ptr);
+               btree->bt_ops->btop_set_target(btree, key, ptr);
 
        for (level = NILFS_BTREE_LEVEL_NODE_MIN; level <= maxlevel; level++) {
                if (btree->bt_bmap.b_pops->bpop_commit_alloc_ptr != NULL) {
-                       (*btree->bt_bmap.b_pops->bpop_commit_alloc_ptr)(
+                       btree->bt_bmap.b_pops->bpop_commit_alloc_ptr(
                                &btree->bt_bmap, &path[level - 1].bp_newreq);
                }
-               (*path[level].bp_op)(btree, path, level, &key, &ptr);
+               path[level].bp_op(btree, path, level, &key, &ptr);
        }
 
        if (!nilfs_bmap_dirty(&btree->bt_bmap))
                        nilfs_btree_node_get_ptr(btree, node,
                                                 path[level].bp_index);
                if (btree->bt_bmap.b_pops->bpop_prepare_end_ptr != NULL) {
-                       ret = (*btree->bt_bmap.b_pops->bpop_prepare_end_ptr)(
+                       ret = btree->bt_bmap.b_pops->bpop_prepare_end_ptr(
                                &btree->bt_bmap, &path[level].bp_oldreq);
                        if (ret < 0)
                                goto err_out_child_node;
        path[level].bp_oldreq.bpr_ptr =
                nilfs_btree_node_get_ptr(btree, node, path[level].bp_index);
        if (btree->bt_bmap.b_pops->bpop_prepare_end_ptr != NULL) {
-               ret = (*btree->bt_bmap.b_pops->bpop_prepare_end_ptr)(
+               ret = btree->bt_bmap.b_pops->bpop_prepare_end_ptr(
                        &btree->bt_bmap, &path[level].bp_oldreq);
                if (ret < 0)
                        goto err_out_child_node;
        /* error */
  err_out_curr_node:
        if (btree->bt_bmap.b_pops->bpop_abort_end_ptr != NULL)
-               (*btree->bt_bmap.b_pops->bpop_abort_end_ptr)(
+               btree->bt_bmap.b_pops->bpop_abort_end_ptr(
                        &btree->bt_bmap, &path[level].bp_oldreq);
  err_out_child_node:
        for (level--; level >= NILFS_BTREE_LEVEL_NODE_MIN; level--) {
                nilfs_bmap_put_block(&btree->bt_bmap, path[level].bp_sib_bh);
                if (btree->bt_bmap.b_pops->bpop_abort_end_ptr != NULL)
-                       (*btree->bt_bmap.b_pops->bpop_abort_end_ptr)(
+                       btree->bt_bmap.b_pops->bpop_abort_end_ptr(
                                &btree->bt_bmap, &path[level].bp_oldreq);
        }
        *levelp = level;
 
        for (level = NILFS_BTREE_LEVEL_NODE_MIN; level <= maxlevel; level++) {
                if (btree->bt_bmap.b_pops->bpop_commit_end_ptr != NULL)
-                       (*btree->bt_bmap.b_pops->bpop_commit_end_ptr)(
+                       btree->bt_bmap.b_pops->bpop_commit_end_ptr(
                                &btree->bt_bmap, &path[level].bp_oldreq);
-               (*path[level].bp_op)(btree, path, level, NULL, NULL);
+               path[level].bp_op(btree, path, level, NULL, NULL);
        }
 
        if (!nilfs_bmap_dirty(&btree->bt_bmap))
        /* cannot find near ptr */
        if (btree->bt_ops->btop_find_target != NULL)
                dreq->bpr_ptr
-                       = (*btree->bt_ops->btop_find_target)(btree, NULL, key);
-       ret = (*bmap->b_pops->bpop_prepare_alloc_ptr)(bmap, dreq);
+                       = btree->bt_ops->btop_find_target(btree, NULL, key);
+       ret = bmap->b_pops->bpop_prepare_alloc_ptr(bmap, dreq);
        if (ret < 0)
                return ret;
 
        stats->bs_nblocks++;
        if (nreq != NULL) {
                nreq->bpr_ptr = dreq->bpr_ptr + 1;
-               ret = (*bmap->b_pops->bpop_prepare_alloc_ptr)(bmap, nreq);
+               ret = bmap->b_pops->bpop_prepare_alloc_ptr(bmap, nreq);
                if (ret < 0)
                        goto err_out_dreq;
 
 
        /* error */
  err_out_nreq:
-       (*bmap->b_pops->bpop_abort_alloc_ptr)(bmap, nreq);
+       bmap->b_pops->bpop_abort_alloc_ptr(bmap, nreq);
  err_out_dreq:
-       (*bmap->b_pops->bpop_abort_alloc_ptr)(bmap, dreq);
+       bmap->b_pops->bpop_abort_alloc_ptr(bmap, dreq);
        stats->bs_nblocks = 0;
        return ret;
 
 
        /* free resources */
        if (bmap->b_ops->bop_clear != NULL)
-               (*bmap->b_ops->bop_clear)(bmap);
+               bmap->b_ops->bop_clear(bmap);
 
        /* ptr must be a pointer to a buffer head. */
        set_buffer_nilfs_volatile((struct buffer_head *)((unsigned long)ptr));
        nilfs_btree_init(bmap, low, high);
        if (nreq != NULL) {
                if (bmap->b_pops->bpop_commit_alloc_ptr != NULL) {
-                       (*bmap->b_pops->bpop_commit_alloc_ptr)(bmap, dreq);
-                       (*bmap->b_pops->bpop_commit_alloc_ptr)(bmap, nreq);
+                       bmap->b_pops->bpop_commit_alloc_ptr(bmap, dreq);
+                       bmap->b_pops->bpop_commit_alloc_ptr(bmap, nreq);
                }
 
                /* create child node at level 1 */
                                      2, 1, &keys[0], &tmpptr);
        } else {
                if (bmap->b_pops->bpop_commit_alloc_ptr != NULL)
-                       (*bmap->b_pops->bpop_commit_alloc_ptr)(bmap, dreq);
+                       bmap->b_pops->bpop_commit_alloc_ptr(bmap, dreq);
 
                /* create root node at level 1 */
                node = nilfs_btree_get_root(btree);
        }
 
        if (btree->bt_ops->btop_set_target != NULL)
-               (*btree->bt_ops->btop_set_target)(btree, key, dreq->bpr_ptr);
+               btree->bt_ops->btop_set_target(btree, key, dreq->bpr_ptr);
 }
 
 /**
                goto out;
        }
 
-       ret = (*btree->bt_ops->btop_propagate)(btree, path, level, bh);
+       ret = btree->bt_ops->btop_propagate(btree, path, level, bh);
 
  out:
        nilfs_btree_clear_path(btree, path);
        ptr = nilfs_btree_node_get_ptr(btree, parent,
                                       path[level + 1].bp_index);
        req.bpr_ptr = ptr;
-       ret = (*btree->bt_bmap.b_pops->bpop_prepare_start_ptr)(&btree->bt_bmap,
+       ret = btree->bt_bmap.b_pops->bpop_prepare_start_ptr(&btree->bt_bmap,
                                                               &req);
        if (ret < 0)
                return ret;
-       (*btree->bt_bmap.b_pops->bpop_commit_start_ptr)(&btree->bt_bmap,
+       btree->bt_bmap.b_pops->bpop_commit_start_ptr(&btree->bt_bmap,
                                                        &req, blocknr);
 
        key = nilfs_btree_node_get_key(btree, parent,
                goto out;
        }
 
-       ret = (*btree->bt_ops->btop_assign)(btree, path, level, bh,
+       ret = btree->bt_ops->btop_assign(btree, path, level, bh,
                                            blocknr, binfo);
 
  out:
 
        int ret;
 
        if (direct->d_ops->dop_find_target != NULL)
-               req->bpr_ptr = (*direct->d_ops->dop_find_target)(direct, key);
-       ret = (*direct->d_bmap.b_pops->bpop_prepare_alloc_ptr)(&direct->d_bmap,
+               req->bpr_ptr = direct->d_ops->dop_find_target(direct, key);
+       ret = direct->d_bmap.b_pops->bpop_prepare_alloc_ptr(&direct->d_bmap,
                                                               req);
        if (ret < 0)
                return ret;
        set_buffer_nilfs_volatile(bh);
 
        if (direct->d_bmap.b_pops->bpop_commit_alloc_ptr != NULL)
-               (*direct->d_bmap.b_pops->bpop_commit_alloc_ptr)(
+               direct->d_bmap.b_pops->bpop_commit_alloc_ptr(
                        &direct->d_bmap, req);
        nilfs_direct_set_ptr(direct, key, req->bpr_ptr);
 
                nilfs_bmap_set_dirty(&direct->d_bmap);
 
        if (direct->d_ops->dop_set_target != NULL)
-               (*direct->d_ops->dop_set_target)(direct, key, req->bpr_ptr);
+               direct->d_ops->dop_set_target(direct, key, req->bpr_ptr);
 }
 
 static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
 
        if (direct->d_bmap.b_pops->bpop_prepare_end_ptr != NULL) {
                req->bpr_ptr = nilfs_direct_get_ptr(direct, key);
-               ret = (*direct->d_bmap.b_pops->bpop_prepare_end_ptr)(
+               ret = direct->d_bmap.b_pops->bpop_prepare_end_ptr(
                        &direct->d_bmap, req);
                if (ret < 0)
                        return ret;
                                       __u64 key)
 {
        if (direct->d_bmap.b_pops->bpop_commit_end_ptr != NULL)
-               (*direct->d_bmap.b_pops->bpop_commit_end_ptr)(
+               direct->d_bmap.b_pops->bpop_commit_end_ptr(
                        &direct->d_bmap, req);
        nilfs_direct_set_ptr(direct, key, NILFS_BMAP_INVALID_PTR);
 }
        /* no need to allocate any resource for conversion */
 
        /* delete */
-       ret = (*bmap->b_ops->bop_delete)(bmap, key);
+       ret = bmap->b_ops->bop_delete(bmap, key);
        if (ret < 0)
                return ret;
 
        /* free resources */
        if (bmap->b_ops->bop_clear != NULL)
-               (*bmap->b_ops->bop_clear)(bmap);
+               bmap->b_ops->bop_clear(bmap);
 
        /* convert */
        direct = (struct nilfs_direct *)bmap;
 
        direct = (struct nilfs_direct *)bmap;
        return (direct->d_ops->dop_propagate != NULL) ?
-               (*direct->d_ops->dop_propagate)(direct, bh) :
+               direct->d_ops->dop_propagate(direct, bh) :
                0;
 }
 
        int ret;
 
        req.bpr_ptr = ptr;
-       ret = (*direct->d_bmap.b_pops->bpop_prepare_start_ptr)(
+       ret = direct->d_bmap.b_pops->bpop_prepare_start_ptr(
                &direct->d_bmap, &req);
        if (ret < 0)
                return ret;
-       (*direct->d_bmap.b_pops->bpop_commit_start_ptr)(&direct->d_bmap,
-                                                       &req, blocknr);
+       direct->d_bmap.b_pops->bpop_commit_start_ptr(&direct->d_bmap,
+                                                    &req, blocknr);
 
        binfo->bi_v.bi_vblocknr = nilfs_bmap_ptr_to_dptr(ptr);
        binfo->bi_v.bi_blkoff = nilfs_bmap_key_to_dkey(key);
        ptr = nilfs_direct_get_ptr(direct, key);
        BUG_ON(ptr == NILFS_BMAP_INVALID_PTR);
 
-       return (*direct->d_ops->dop_assign)(direct, key, ptr, bh,
-                                           blocknr, binfo);
+       return direct->d_ops->dop_assign(direct, key, ptr, bh,
+                                        blocknr, binfo);
 }
 
 static const struct nilfs_bmap_operations nilfs_direct_ops = {