netdev - Re: [net-next v4 5/8] net: rds: convert tasklets to use new tasklet

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Date:   Thu, 5 Nov 2020 16:47:33 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     santosh.shilimkar@...cle.com
Cc:     Allen Pais <allen.lkml@...il.com>, davem@...emloft.net,
        gerrit@....abdn.ac.uk, edumazet@...gle.com, kuznet@....inr.ac.ru,
        yoshfuji@...ux-ipv6.org, johannes@...solutions.net,
        alex.aring@...il.com, stefan@...enfreihafen.org, jhs@...atatu.com,
        xiyou.wangcong@...il.com, jiri@...nulli.us,
        steffen.klassert@...unet.com, herbert@...dor.apana.org.au,
        netdev@...r.kernel.org, Allen Pais <apais@...ux.microsoft.com>,
        Romain Perier <romain.perier@...il.com>
Subject: Re: [net-next v4 5/8] net: rds: convert tasklets to use new
 tasklet_setup() API

On Tue,  3 Nov 2020 14:48:20 +0530 Allen Pais wrote:
> From: Allen Pais <apais@...ux.microsoft.com>
> 
> In preparation for unconditionally passing the
> struct tasklet_struct pointer to all tasklet
> callbacks, switch to using the new tasklet_setup()
> and from_tasklet() to pass the tasklet pointer explicitly.
> 
> Signed-off-by: Romain Perier <romain.perier@...il.com>
> Signed-off-by: Allen Pais <apais@...ux.microsoft.com>

Santosh, ack/nack for this going into net-next?

> diff --git a/net/rds/ib_cm.c b/net/rds/ib_cm.c
> index b36b60668b1d..d06398be4b80 100644
> --- a/net/rds/ib_cm.c
> +++ b/net/rds/ib_cm.c
> @@ -314,9 +314,9 @@ static void poll_scq(struct rds_ib_connection *ic, struct ib_cq *cq,
>  	}
>  }
>  
> -static void rds_ib_tasklet_fn_send(unsigned long data)
> +static void rds_ib_tasklet_fn_send(struct tasklet_struct *t)
>  {
> -	struct rds_ib_connection *ic = (struct rds_ib_connection *)data;
> +	struct rds_ib_connection *ic = from_tasklet(ic, t, i_send_tasklet);
>  	struct rds_connection *conn = ic->conn;
>  
>  	rds_ib_stats_inc(s_ib_tasklet_call);
> @@ -354,9 +354,9 @@ static void poll_rcq(struct rds_ib_connection *ic, struct ib_cq *cq,
>  	}
>  }
>  
> -static void rds_ib_tasklet_fn_recv(unsigned long data)
> +static void rds_ib_tasklet_fn_recv(struct tasklet_struct *t)
>  {
> -	struct rds_ib_connection *ic = (struct rds_ib_connection *)data;
> +	struct rds_ib_connection *ic = from_tasklet(ic, t, i_recv_tasklet);
>  	struct rds_connection *conn = ic->conn;
>  	struct rds_ib_device *rds_ibdev = ic->rds_ibdev;
>  	struct rds_ib_ack_state state;
> @@ -1219,10 +1219,8 @@ int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp)
>  	}
>  
>  	INIT_LIST_HEAD(&ic->ib_node);
> -	tasklet_init(&ic->i_send_tasklet, rds_ib_tasklet_fn_send,
> -		     (unsigned long)ic);
> -	tasklet_init(&ic->i_recv_tasklet, rds_ib_tasklet_fn_recv,
> -		     (unsigned long)ic);
> +	tasklet_setup(&ic->i_send_tasklet, rds_ib_tasklet_fn_send);
> +	tasklet_setup(&ic->i_recv_tasklet, rds_ib_tasklet_fn_recv);
>  	mutex_init(&ic->i_recv_mutex);
>  #ifndef KERNEL_HAS_ATOMIC64
>  	spin_lock_init(&ic->i_ack_lock);