Re: [dpdk-dev] [PATCH v8 2/3] eal: add u64 bit variant for reciprocal

[Hemant Agrawal <hemant.agrawal@nxp.com>]

On 1/29/2018 1:24 PM, Pavan Nikhilesh wrote:
> Hi Hemant,
> 
> On Mon, Jan 29, 2018 at 12:12:55PM +0530, Hemant Agrawal wrote:
>> Hi Pavan,
>>      I am bit late in checking it. (series is already applied)
>>
>> Just few legal queries.
>>
>>> --- a/lib/librte_eal/common/rte_reciprocal.c > +++
>> b/lib/librte_eal/common/rte_reciprocal.c
>>> @@ -1,3 +1,6 @@
>>> +/* SPDX-License-Identifier: BSD-3-Clause
>>> + * Copyright(c) 2017 Cavium, Inc
>>
>> you have added Cavium's copyright here.
>>
>>> +
>>> +/*
>>> + * Code taken from Hacker's Delight:
>>> + * http://www.hackersdelight.org/hdcodetxt/divlu.c.txt
>>> + * License permits inclusion here per:
>>> + * http://www.hackersdelight.org/permissions.htm
>>> + */
>>
>> Did you clarify it Cavium's legal team?
>>
>> The permissions states that you should not add it to another publication
>> without written permission. DPDK can be considered a publication.
>> Did you got written permission?
> 
> The link specifically states that only the "The textural material and pictures
> are copyright by the author" and "You are free to use, copy, and distribute any
> of the code on this web site, whether modified by you or not".
> The textural material in this case mean any text/pictures taken from the
> Hacker's Delight book.
> 
> The linux kernel also uses similar code as seen at
> https://github.com/torvalds/linux/blob/master/lib/div64.c.
> 
> Let me know if any further clarification are needed.

Thanks. It is clear now.


> 
> Regards,
> Pavan.
> 
>>
>> If not please specify Cavium's legal team opinion or take permission from
>> author. I believe that it is easy to obtain permission for this code.
>>
>>>>>>>>
>> "You are free to use, copy, and distribute any of the code on this web site,
>> whether modified by you or not. You need not give attribution. This includes
>> the algorithms (some of which appear in Hacker's Delight), the Hacker's
>> Assistant, and any code submitted by readers. Submitters implicitly agree to
>> this.
>>
>> *The textural material and pictures are copyright by the author, and the
>> usual copyright rules apply. E.g., you may store the material on your
>> computer and make hard or soft copies for your own use. However, you may not
>> incorporate this material into another publication without written
>> permission from the author (which the author may give by email).*
>>
>> The author has taken care in the preparation of this material, but makes no
>> expressed or implied warranty of any kind and assumes no responsibility for
>> errors or omissions. No liability is assumed for incidental or consequential
>> damages in connection with or arising out of the use of the information or
>> programs contained herein."
>>>>>>>>>>>
>> regards,
>> Hemant
>>
>