linux-kernel - Re: [PATCH v4 27/27] IB/Verbs: Cleanup rdma_node_get

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Message-ID: <552FBBEC.3020606@profitbricks.com>
Date:	Thu, 16 Apr 2015 15:41:00 +0200
From:	Michael Wang <yun.wang@...fitbricks.com>
To:	Hal Rosenstock <hal@....mellanox.co.il>
CC:	Roland Dreier <roland@...nel.org>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tom Tucker <tom@...ngridcomputing.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	Mike Marciniszyn <infinipath@...el.com>,
	Eli Cohen <eli@...lanox.com>,
	Faisal Latif <faisal.latif@...el.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	Ira Weiny <ira.weiny@...el.com>, Tom Talpey <tom@...pey.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Doug Ledford <dledford@...hat.com>
Subject: Re: [PATCH v4 27/27] IB/Verbs: Cleanup rdma_node_get_transport()



On 04/16/2015 03:36 PM, Hal Rosenstock wrote:
[snip]
>> -EXPORT_SYMBOL(rdma_node_get_transport);
>> -
>>  enum rdma_link_layer rdma_port_get_link_layer(struct ib_device *device, u8 port_num)
>>  {
>>  	if (device->get_link_layer)
>> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
>> index 262bf44..f9ef479 100644
>> --- a/include/rdma/ib_verbs.h
>> +++ b/include/rdma/ib_verbs.h
>> @@ -84,9 +84,6 @@ enum rdma_transport_type {
>>  	RDMA_TRANSPORT_IBOE,
>>  };
>>  
>> -__attribute_const__ enum rdma_transport_type
>> -rdma_node_get_transport(enum rdma_node_type node_type);
>> -
>>  enum rdma_link_layer {
>>  	IB_LINK_LAYER_UNSPECIFIED,
> 
> Is IB_LINK_LAYER_UNSPECIFIED still possible ?

Actually it's impossible in kernel at first, all those who implemented the callback
won't return UNSPECIFIED, others all have the correct transport type (otherwise BUG())
and won't result UNSPECIFIED :-)

Regards,
Michael Wang

> 
>>  	IB_LINK_LAYER_INFINIBAND,
--
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