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SubjectRe: [PATCH for-next 8/9] RDMA/hns: Remove unused struct members in hns-abi.h
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On 2017/9/28 17:02, Leon Romanovsky wrote:
> On Thu, Sep 28, 2017 at 12:57:33PM +0800, Wei Hu (Xavier) wrote:
>> From: Lijun Ou <oulijun@huawei.com>
>>
>> This patch mainly deletes some unused struct members for
>> hns_roce_ib_create_qp in order to match libhns, because
>> the num of struct members of hns_roce_ib_create_qp must
>> be the same with hns_roce_create_qp in libhns.
>>
>> Signed-off-by: Lijun Ou <oulijun@huawei.com>
>> Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
>> Signed-off-by: Shaobo Xu <xushaobo2@huawei.com>
>> ---
>> include/uapi/rdma/hns-abi.h | 2 --
>> 1 file changed, 2 deletions(-)
>>
>> diff --git a/include/uapi/rdma/hns-abi.h b/include/uapi/rdma/hns-abi.h
>> index 5d74019..79251b6 100644
>> --- a/include/uapi/rdma/hns-abi.h
>> +++ b/include/uapi/rdma/hns-abi.h
>> @@ -41,10 +41,8 @@ struct hns_roce_ib_create_cq {
>>
>> struct hns_roce_ib_create_qp {
>> __u64 buf_addr;
>> - __u64 db_addr;
>> __u8 log_sq_bb_count;
>> __u8 log_sq_stride;
>> - __u8 sq_no_prefetch;
>> __u8 reserved[5];
>> };
> It is classical UAPI breakage which kernel tries to avoid.
>
> In RDMA, we do allow rename of fields from reserved to something, but
> don't allow binary layout change.
>
> NAK to this change.
>
> Thanks
Hi, Leon
Now there is an inconsistency between hns_roce_ib_create_qp in
kernel driver and hns_roce_create_qp in libhns as below:

struct hns_roce_create_qp {
struct ibv_create_qp ibv_cmd;
__u64 buf_addr;
__u8 log_sq_bb_count;
__u8 log_sq_stride;
__u8 reserved[5];
};
It is better to modify hns_roce_create_qp in libhns, right?
Thanks

Regards
Wei Hu
>> --
>> 1.9.1
>>
>> --
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