Re: [dpdk-dev] [PATCH v2] PCI: ABI change request for adding new field in rte_pci_id structure

[Panu Matilainen <pmatilai@redhat.com>]

On 02/16/2016 05:16 AM, Ziye Yang wrote:
> From: Ziye <ziye.yang@intel.com>
>
> The purpose of this patch is used to add a new field
> "class" in rte_pci_id structure. The new class field includes
> class_id, subcalss_id, programming interface of a pci device.
> With this field, we can identify pci device by its class info,
> which can be more flexible instead of probing the device by
> vendor_id OR device_id OR subvendor_id OR subdevice_id.
> For example, we can probe all nvme devices by class field, which
> can be quite convenient.
>
> Signed-off-by: Ziye Yang <ziye.yang@intel.com>
> ---
>   doc/guides/rel_notes/release_16_04.rst | 7 ++++---
>   1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/doc/guides/rel_notes/release_16_04.rst b/doc/guides/rel_notes/release_16_04.rst
> index 27fc624..fe843a5 100644
> --- a/doc/guides/rel_notes/release_16_04.rst
> +++ b/doc/guides/rel_notes/release_16_04.rst
> @@ -95,9 +95,10 @@ This section should contain API changes. Sample format:
>   ABI Changes
>   -----------
>
> -* Add a short 1-2 sentence description of the ABI change that was announced in
> -  the previous releases and made in this release. Use fixed width quotes for
> -  ``rte_function_names`` or ``rte_struct_names``. Use the past tense.
> +* New field ``class`` is added into ``rte_pci_id`` structure. This new
> +  added ``class`` field can be used to probe pci devices by class related
> +  info. With this new field, the size of structure ``rte_pci_device`` will
> +  be increased.
>
>
>   Shared Library Versions
>

ABI breakage announcements go into doc/guides/rel_notes/deprecation.rst, 
see the examples there. Also you can't break the ABI in the version 
under development but only the next one, so right now the earliest ABI 
breakage opportunity is in the release *after* 16.04, which is supposed 
to be 16.07 according to the roadmap.

	- Panu -