From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 452F2C282C4 for ; Tue, 12 Feb 2019 16:16:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 14784217D9 for ; Tue, 12 Feb 2019 16:16:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="A/xtyrIf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731044AbfBLQQF (ORCPT ); Tue, 12 Feb 2019 11:16:05 -0500 Received: from mail-it1-f182.google.com ([209.85.166.182]:35595 "EHLO mail-it1-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728869AbfBLQQE (ORCPT ); Tue, 12 Feb 2019 11:16:04 -0500 Received: by mail-it1-f182.google.com with SMTP id v72so8928131itc.0 for ; Tue, 12 Feb 2019 08:16:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=BcbiwYoeQ5EFhhDuBwroyRQ+sI20g7wH4KgP+AYudGY=; b=A/xtyrIfUNy9SE+lMTaGWod/Ahk16uh9S1uJRG8I/Yeogq/6FKslvnPNZ1Y4POeiIE qxNbewnGi6nRAbi3CJbaFc+O9teeJF8i1MsTi+wXwBF+Sv9fi4Sf66jVNLXFxRVW4FHJ 9q5ytJeZiDg5wd6TwOj33M1rMNB7nOohAwuo05BuNGfSVE+KV/h4omh1llNfJqomrzbT YJYWst6MKzVEm66IOXwk3ZUE9xOvWheY3AwbUvEC8yOAnHsn21aNk6WINi9/7nCXX8sz Lr2iP0rjt9FPJZdu3aqC8Mfo+FyxfSlj16K8BM/XxBte2qUDA1OXeUg1L/MvN2p8CxFL 6XPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=BcbiwYoeQ5EFhhDuBwroyRQ+sI20g7wH4KgP+AYudGY=; b=JbsckwF4qK5QiRqll6s/w4wiGXZUWM8xSStm6/I1uRxZkguJRXxWlcp/8JXbXs3S4l R4pDX/1K4LsBI/gDuTyeyIWk/65/GfuZR3hr4oK1vzXmt6lcLY/ysRiLjkKQ5SzIqXN9 iAC2HFTp6hiilNHFfHTxY9FXmDZfcp+5kcTxSep2NccLSlGbqgcdkR/aziC0oJ/6t6VE L27WWgJYosm9kDyial8DXmdgt6SoFt2OVaz3IBiJuyNgvp4kUq9CSEM6mOOYEqGqadrt pRPKS098r2A1h38Q7lHp9jaXjYES3GYaVn0f0h26q0vQVlD6BlQwl049u6/PyUkiuihb zbcQ== X-Gm-Message-State: AHQUAuZbg4vJfzIQWsfF87iFuIbjWcGhda6U9tVa7VMSkECHx6qq+zuI TPVbGGXpzoB3KCXwAqQuSsrdhQ== X-Google-Smtp-Source: AHgI3IbdLxICyFu6EDFSuhU8UQ3XIDrIwnK96R1Uk/Vg5H1zWGMNafFt22QCYjCdOUONpj/pqcz/qQ== X-Received: by 2002:a02:97ee:: with SMTP id v43mr2353260jaj.67.1549988163583; Tue, 12 Feb 2019 08:16:03 -0800 (PST) Received: from [192.168.1.158] ([216.160.245.98]) by smtp.gmail.com with ESMTPSA id v6sm5960745ioh.37.2019.02.12.08.16.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 12 Feb 2019 08:16:02 -0800 (PST) Subject: Re: Bug#919356: Licensing of include/linux/hash.h To: Ben Finney , Martin Steigerwald Cc: Domenico Andreoli , 919356@bugs.debian.org, Kristian Fiskerstrand , Nadia Yvette Chambers , Arnaldo Carvalho de Melo , "debian-legal@lists.debian.org" , "linux-kernel@vger.kernel.org" , Jens Axboe References: <20190115170017.5gxarqxzfezgr5ld@dumbo> <20190211072259.GA19224@nouveau> <20190115083241.6c6ftrw73xuv26j6@dumbo> <2977287.v5rPGuGa1n@merkaba> <86va1p7c7z.fsf@benfinney.id.au> From: Jens Axboe Message-ID: <8a87da85-3aef-a113-f93f-c96ab465c96f@kernel.dk> Date: Tue, 12 Feb 2019 09:16:00 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <86va1p7c7z.fsf@benfinney.id.au> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/11/19 11:27 PM, Ben Finney wrote: > Martin Steigerwald writes: > >> Well the file has in its header: >> >> /* Fast hashing routine for a long. >> (C) 2002 William Lee Irwin III, IBM */ >> >> /* >> * Knuth recommends primes in approximately golden ratio to the maximum >> * integer representable by a machine word for multiplicative hashing. >> * Chuck Lever verified the effectiveness of this technique: >> * http://www.citi.umich.edu/techreports/reports/citi-tr-00-1.pdf >> * >> * These primes are chosen to be bit-sparse, that is operations on >> * them can use shifts and additions instead of multiplications for >> * machines where multiplications are slow. >> */ >> >> It has been quite a while ago. I bet back then I did not regard this >> as license information since it does not specify a license. Thus I >> assumed it to be GPL-2 as the other files which have no license boiler >> plate. I.e.: Check file is it has different license, if not, then >> assume it has license as specified in COPYING. >> >> Not specifying a license can however also mean in this context that it >> has no license as the file contains copyright information from another >> author. > > If a work (even one file) “has no license”, that means no special > permissions are granted and normal copyright applies: All rights > reserved, i.e. not redistributable. So, no license is grounds to > consider a work non-free and non-redistributable. > > If, on the other hand, the file is to be free software, there would need > to be a clear grant of some free software license to that work. > > Given the confusion over this file, I would consider it a significant > risk to just assume we have GPLv2 permissions without being told that > explicitly by the copyright holder. Rather, the reason we are seeking a > clearly-granted free license for this one file, is because we are trying > to replace a probably non-free file with the same code in it. > > It seems we need to keep looking, and in the meantime assume we have no > free license in this file. FWIW, fio.c includes the following mention: * The license below covers all files distributed with fio unless otherwise * noted in the file itself. followed by the GPL v2 license. I'll go through and add SPDX headers to everything to avoid wasting anymore time on this nonsense. -- Jens Axboe