Re: [dpdk-dev] [PATCH v8 2/3] ring: introduce new header file to include common functions

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

Hi Jia,

On 1/17/2018 9:33 AM, Jia He wrote:
> Move the common part of rte_ring.h into rte_ring_generic.h.
> Move the memory barrier part into update_tail().
>
> No functional changes here.
>
> Signed-off-by: Jia He <jia.he@hxt-semitech.com>
> Suggested-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> Suggested-by: Ananyev Konstantin <konstantin.ananyev@intel.com>
> Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
> Acked-by: Olivier Matz <olivier.matz@6wind.com>
> ---
> diff --git a/lib/librte_ring/rte_ring_generic.h b/lib/librte_ring/rte_ring_generic.h
> new file mode 100644
> index 0000000..01f2cae
> --- /dev/null
> +++ b/lib/librte_ring/rte_ring_generic.h
> @@ -0,0 +1,202 @@
> +/*-
> + *   Copyright(c) 2017 Intel Corporation. All rights reserved.
> + *   All rights reserved.
> + *
> + *   SPDX-License-Identifier: BSD-3-Clause

The SPDX should be first line. See other files for Intel or NXP.

> + */
> +
> +/*
> + * Derived from FreeBSD's bufring.h
> + *
> + **************************************************************************
> + *
> + * Copyright (c) 2007-2009 Kip Macy kmacy@freebsd.org
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are met:
> + *
> + * 1. Redistributions of source code must retain the above copyright notice,
> + *    this list of conditions and the following disclaimer.
> + *
> + * 2. The name of Kip Macy nor the names of other
> + *    contributors may be used to endorse or promote products derived from
> + *    this software without specific prior written permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
> + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGE.
> + *
> + ***************************************************************************/
> +

This is BSD-2-freebsd, which is not a approved license for DPDK.
Can you ask Kip Macy, if he/she is ok to re-license it with BSD-3?

Please check with legal, if you can just keep the copyright of Kip Macy 
and re license it with BSD-3.

I see the BSD-3 license to be permissive enough to be re-licensed as 
BSD-3. But I am not a lawyer.