linux-kernel - Re: [PATCH net-next v4 1/4] netconsole: move init/cleanup functions lower

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Message-ID: <ZSs4RgtcYqkJc1Px@google.com>
Date:   Sat, 14 Oct 2023 17:54:30 -0700
From:   Joel Becker <jlbec@...lplan.org>
To:     Breno Leitao <leitao@...ian.org>
Cc:     kuba@...nel.org, davem@...emloft.net, pabeni@...hat.com,
        Eric Dumazet <edumazet@...gle.com>, hch@....de,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        horms@...nel.org
Subject: Re: [PATCH net-next v4 1/4] netconsole: move init/cleanup functions
 lower

On Thu, Oct 12, 2023 at 04:13:58AM -0700, Breno Leitao wrote:
> Move alloc_param_target() and its counterpart (free_param_target())
> to the bottom of the file. These functions are called mostly at
> initialization/cleanup of the module, and they should be just above the
> callers, at the bottom of the file.
> 
> >From a practical perspective, having alloc_param_target() at the bottom
> of the file will avoid forward declaration later (in the following
> patch).
> 
> Nothing changed other than the functions location.
> 
> Suggested-by: Jakub Kicinski <kuba@...nel.org>
> Signed-off-by: Breno Leitao <leitao@...ian.org>
Reviewed-by: Joel Becker <jlbec@...lplan.org>

> ---
>  drivers/net/netconsole.c | 104 +++++++++++++++++++--------------------
>  1 file changed, 52 insertions(+), 52 deletions(-)
> 
> diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
> index 3111e1648592..d609fb59cf99 100644
> --- a/drivers/net/netconsole.c
> +++ b/drivers/net/netconsole.c
> @@ -192,58 +192,6 @@ static struct netconsole_target *alloc_and_init(void)
>  	return nt;
>  }
>  
> -/* Allocate new target (from boot/module param) and setup netpoll for it */
> -static struct netconsole_target *alloc_param_target(char *target_config)
> -{
> -	struct netconsole_target *nt;
> -	int err;
> -
> -	nt = alloc_and_init();
> -	if (!nt) {
> -		err = -ENOMEM;
> -		goto fail;
> -	}
> -
> -	if (*target_config == '+') {
> -		nt->extended = true;
> -		target_config++;
> -	}
> -
> -	if (*target_config == 'r') {
> -		if (!nt->extended) {
> -			pr_err("Netconsole configuration error. Release feature requires extended log message");
> -			err = -EINVAL;
> -			goto fail;
> -		}
> -		nt->release = true;
> -		target_config++;
> -	}
> -
> -	/* Parse parameters and setup netpoll */
> -	err = netpoll_parse_options(&nt->np, target_config);
> -	if (err)
> -		goto fail;
> -
> -	err = netpoll_setup(&nt->np);
> -	if (err)
> -		goto fail;
> -
> -	nt->enabled = true;
> -
> -	return nt;
> -
> -fail:
> -	kfree(nt);
> -	return ERR_PTR(err);
> -}
> -
> -/* Cleanup netpoll for given target (from boot/module param) and free it */
> -static void free_param_target(struct netconsole_target *nt)
> -{
> -	netpoll_cleanup(&nt->np);
> -	kfree(nt);
> -}
> -
>  #ifdef	CONFIG_NETCONSOLE_DYNAMIC
>  
>  /*
> @@ -938,6 +886,58 @@ static void write_msg(struct console *con, const char *msg, unsigned int len)
>  	spin_unlock_irqrestore(&target_list_lock, flags);
>  }
>  
> +/* Allocate new target (from boot/module param) and setup netpoll for it */
> +static struct netconsole_target *alloc_param_target(char *target_config)
> +{
> +	struct netconsole_target *nt;
> +	int err;
> +
> +	nt = alloc_and_init();
> +	if (!nt) {
> +		err = -ENOMEM;
> +		goto fail;
> +	}
> +
> +	if (*target_config == '+') {
> +		nt->extended = true;
> +		target_config++;
> +	}
> +
> +	if (*target_config == 'r') {
> +		if (!nt->extended) {
> +			pr_err("Netconsole configuration error. Release feature requires extended log message");
> +			err = -EINVAL;
> +			goto fail;
> +		}
> +		nt->release = true;
> +		target_config++;
> +	}
> +
> +	/* Parse parameters and setup netpoll */
> +	err = netpoll_parse_options(&nt->np, target_config);
> +	if (err)
> +		goto fail;
> +
> +	err = netpoll_setup(&nt->np);
> +	if (err)
> +		goto fail;
> +
> +	nt->enabled = true;
> +
> +	return nt;
> +
> +fail:
> +	kfree(nt);
> +	return ERR_PTR(err);
> +}
> +
> +/* Cleanup netpoll for given target (from boot/module param) and free it */
> +static void free_param_target(struct netconsole_target *nt)
> +{
> +	netpoll_cleanup(&nt->np);
> +	kfree(nt);
> +}
> +
>  static struct console netconsole_ext = {
>  	.name	= "netcon_ext",
>  	.flags	= CON_ENABLED | CON_EXTENDED,
> -- 
> 2.34.1
> 

-- 

"There is shadow under this red rock.
 (Come in under the shadow of this red rock)
 And I will show you something different from either
 Your shadow at morning striding behind you
 Or your shadow at evening rising to meet you.
 I will show you fear in a handful of dust."

			http://www.jlbec.org/
			jlbec@...lplan.org