Re: [PATCH rdma-next] RDMA/srpt: Fix RCU debug build error

[Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>]

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On Tue, Jan 23, 2018 at 10:30:08PM +0000, Bart Van Assche wrote:
> On Tue, 2018-01-23 at 20:57 +0200, Leon Romanovsky wrote:
> > So how are we going to solve that rdma/for-next doesn't compile?
>
> How about the following?
>
> [PATCH] IB/srpt: Fix CONFIG_DEBUG_OBJECTS_RCU_HEAD=y build
>
> Avoid that the kernel build fails as follows if RCU debugging is
> enabled:
>
> ERROR: "init_rcu_head" [drivers/infiniband/ulp/srpt/ib_srpt.ko] undefined!
>
> diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
> index 5ccc75c389e2..a78a79791950 100644
> --- a/drivers/infiniband/ulp/srpt/ib_srpt.c
> +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
> @@ -1977,7 +1977,6 @@ static struct srpt_nexus *srpt_get_nexus(struct srpt_port *sport,
>  			nexus = ERR_PTR(-ENOMEM);
>  			break;
>  		}
> -		init_rcu_head(&tmp_nexus->rcu);
>  		INIT_LIST_HEAD(&tmp_nexus->ch_list);
>  		memcpy(tmp_nexus->i_port_id, i_port_id, 16);
>  		memcpy(tmp_nexus->t_port_id, t_port_id, 16);
> @@ -2147,7 +2146,6 @@ static int srpt_cm_req_recv(struct srpt_device *const sdev,
>  		goto reject;
>  	}
>
> -	init_rcu_head(&ch->rcu);
>  	kref_init(&ch->kref);
>  	ch->pkey = be16_to_cpu(pkey);
>  	ch->nexus = nexus;

Thanks

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