make_dentry_ptr_block
make_dentry_ptr_block(inode, &d, dentry_blk);
make_dentry_ptr_block(dir, &d, dentry_blk);
make_dentry_ptr_block(NULL, &d, dentry_blk);
make_dentry_ptr_block(NULL, &d, dentry_blk);
make_dentry_ptr_block(dir, &dst, dentry_blk);