linux-kernel - Re: [PATCH] greybus: timesync: replace init_timer with setup

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Date:   Mon, 2 Jan 2017 10:54:20 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Xie Qirong <xieqr16@....edu.cn>
Cc:     Bryan O'Donoghue <pure.logic@...us-software.ie>,
        Johan Hovold <johan@...nel.org>, Alex Elder <elder@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: Re: [PATCH] greybus: timesync: replace init_timer with setup_timer

On Tue, Dec 13, 2016 at 10:39:57PM +0800, Xie Qirong wrote:
> The combination of init_timer and setting up the data and function field
> manually is equivalent to calling setup_timer(). This is an api 
> consolidation only and improves readability.
> 
> Signed-off-by: Xie Qirong <xieqr16@....edu.cn>
> ---
> 
>  setup_timer.cocci suggested the following improvement:
>  drivers/staging/greybus/timesync.c:1058:1-11: Use setup_timer function 
>  for function on line 1059.
> 
>  Patch was compile checked with: x86_64_defconfig + CONFIG_STAGING=y, 
>  CONFIG_GREYBUS=m
> 
>  Kernel version: 4.9.0 (localversion-next is next-20161213)
> 
>  drivers/staging/greybus/timesync.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/greybus/timesync.c b/drivers/staging/greybus/timesync.c
> index 29e6c1c..af83e12 100644
> --- a/drivers/staging/greybus/timesync.c
> +++ b/drivers/staging/greybus/timesync.c
> @@ -1055,10 +1055,9 @@ int gb_timesync_svc_add(struct gb_svc *svc)
>  		goto done;
>  	}
>  
> -	init_timer(&timesync_svc->ktime_timer);
> -	timesync_svc->ktime_timer.function = gb_timesync_ktime_timer_fn;
> +	setup_timer(&timesync_svc->ktime_timer, gb_timesync_ktime_timer_fn,
> +		(unsigned long)timesync_svc);

Please make sure to align the continuation line to the open parenthesis
(which is the style followed in this file).

>  	timesync_svc->ktime_timer.expires = jiffies + GB_TIMESYNC_KTIME_UPDATE;
> -	timesync_svc->ktime_timer.data = (unsigned long)timesync_svc;
>  	add_timer(&timesync_svc->ktime_timer);
>  done:
>  	mutex_unlock(&gb_timesync_svc_list_mutex);

When resending you can add my

Reviewed-by: Johan Hovold <johan@...nel.org>

Thanks,
Johan