Re: [PATCH] xen/pvcalls-back: Remove redundant 'flush_workqueue()' calls

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Thu, 14 Oct 2021, Christophe JAILLET wrote:
> 'destroy_workqueue()' already drains the queue before destroying it, so
> there is no need to flush it explicitly.
> 
> Remove the redundant 'flush_workqueue()' calls.
> 
> This was generated with coccinelle:
> 
> @@
> expression E;
> @@
> -     flush_workqueue(E);
>       destroy_workqueue(E);
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>

Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


> ---
>  drivers/xen/pvcalls-back.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c
> index b47fd8435061..d6f945fd4147 100644
> --- a/drivers/xen/pvcalls-back.c
> +++ b/drivers/xen/pvcalls-back.c
> @@ -465,7 +465,6 @@ static int pvcalls_back_release_passive(struct 
> xenbus_device *dev,
>               write_unlock_bh(&mappass->sock->sk->sk_callback_lock);
>       }
>       sock_release(mappass->sock);
> -     flush_workqueue(mappass->wq);
>       destroy_workqueue(mappass->wq);
>       kfree(mappass);
>  
> -- 
> 2.30.2
>