rem: chunk_put(sf->readahead);
add: chunk_put_locked(sf->readahead);
context: static int sshfs_release(const char *path, struct fuse_file_info *fi){    struct sshfs_file *sf = (struct sshfs_file *) fi->fh;    struct buffer *handle = &sf->handle;    sshfs_flush(path, fi);    sftp_request(SSH_FXP_CLOSE, handle, 0, NULL);    buf_free(handle);    chunk_put(sf->readahead);    g_free(sf);    return 0;}