linux-kernel - Re: [PATCH 03/24] n_hdlc: convert debuglevel use to pr

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Message-ID: <f3bac52dffc9e5402eb6c6106256dffaf550ee90.camel@perches.com>
Date:   Wed, 19 Feb 2020 04:20:33 -0800
From:   Joe Perches <joe@...ches.com>
To:     Jiri Slaby <jslaby@...e.cz>, gregkh@...uxfoundation.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/24] n_hdlc: convert debuglevel use to pr_debug

On Wed, 2020-02-19 at 09:40 +0100, Jiri Slaby wrote:
> With pr_debug we have a fine-grained control about debugging prints. So
> convert the use of global debuglevel variable and tests to a commonly
> used pr_debug. And drop debuglevel completely.
> 
> This also implicitly adds a loglevel to the messages (KERN_DEBUG) as it
> was missing on most of them.
[]
> diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
[]
> @@ -310,11 +306,9 @@ static int n_hdlc_tty_open (struct tty_struct *tty)
>  {
>  	struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
>  
> -	if (debuglevel >= DEBUG_LEVEL_INFO)	
> -		printk("%s(%d)n_hdlc_tty_open() called (device=%s)\n",
> -		__FILE__,__LINE__,
> -		tty->name);
> -		
> +	pr_debug("%s(%d)%s() called (device=%s)\n",
> +			__FILE__, __LINE__, __func__, tty->name);

Perhaps remove all the __FILE__ and __LINE__ arguments as
dynamic debug could emit module and __LINE__ when necessary.