linux-kernel - Re: [PATCH -next v2] platform/surface: aggregator: Use list_move_tail instead of list_del/list_add_tail in ssh_packet

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Date:   Wed, 9 Jun 2021 13:37:31 +0200
From:   Maximilian Luz <luzmaximilian@...il.com>
To:     Baokun Li <libaokun1@...wei.com>, linux-kernel@...r.kernel.org,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <mgross@...ux.intel.com>
Cc:     weiyongjun1@...wei.com, yuehaibing@...wei.com,
        yangjihong1@...wei.com, yukuai3@...wei.com,
        platform-driver-x86@...r.kernel.org,
        kernel-janitors@...r.kernel.org, Hulk Robot <hulkci@...wei.com>
Subject: Re: [PATCH -next v2] platform/surface: aggregator: Use list_move_tail
 instead of list_del/list_add_tail in ssh_packet_layer.c

On 6/9/21 9:24 AM, Baokun Li wrote:
> Using list_move_tail() instead of list_del() + list_add_tail() in ssh_packet_layer.c.
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Baokun Li <libaokun1@...wei.com>
> ---

Looks good to me, thanks!

Reviewed-by: Maximilian Luz <luzmaximilian@...il.com>

Regards,
Max

> V1->V2:
> 	CC mailist
> 
>   .../surface/aggregator/ssh_packet_layer.c  | 10 +++-------
>   1 file changed, 3 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/platform/surface/aggregator/ssh_packet_layer.c b/drivers/platform/surface/aggregator/ssh_packet_layer.c
> index 15d96eac6811..2f546ad11c4e 100644
> --- a/drivers/platform/surface/aggregator/ssh_packet_layer.c
> +++ b/drivers/platform/surface/aggregator/ssh_packet_layer.c
> @@ -1567,9 +1567,7 @@ static void ssh_ptl_timeout_reap(struct work_struct *work)
>   		clear_bit(SSH_PACKET_SF_PENDING_BIT, &p->state);
>   
>   		atomic_dec(&ptl->pending.count);
> -		list_del(&p->pending_node);
> -
> -		list_add_tail(&p->pending_node, &claimed);
> +		list_move_tail(&p->pending_node, &claimed);
>   	}
>   
>   	spin_unlock(&ptl->pending.lock);
> @@ -1957,8 +1955,7 @@ void ssh_ptl_shutdown(struct ssh_ptl *ptl)
>   		smp_mb__before_atomic();
>   		clear_bit(SSH_PACKET_SF_QUEUED_BIT, &p->state);
>   
> -		list_del(&p->queue_node);
> -		list_add_tail(&p->queue_node, &complete_q);
> +		list_move_tail(&p->queue_node, &complete_q);
>   	}
>   	spin_unlock(&ptl->queue.lock);
>   
> @@ -1970,8 +1967,7 @@ void ssh_ptl_shutdown(struct ssh_ptl *ptl)
>   		smp_mb__before_atomic();
>   		clear_bit(SSH_PACKET_SF_PENDING_BIT, &p->state);
>   
> -		list_del(&p->pending_node);
> -		list_add_tail(&p->pending_node, &complete_q);
> +		list_move_tail(&p->pending_node, &complete_q);
>   	}
>   	atomic_set(&ptl->pending.count, 0);
>   	spin_unlock(&ptl->pending.lock);
>