linux-kernel - Re: [PATCH] staging: rtl8192u: ieee80211: Convert printks to pr

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Date:   Wed, 21 Jun 2017 09:31:11 -0700
From:   Joe Perches <joe@...ches.com>
To:     simran singhal <singhalsimran0@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8192u: ieee80211: Convert printks to
 pr_<level>

On Wed, 2017-06-21 at 17:49 +0530, simran singhal wrote:
> Use the current logging style.
> Coalesce formats where appropriate.
[]
> diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
[]
> @@ -236,8 +236,8 @@ ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
>  
>  	#ifdef NOT_YET
>  	if (ieee->iw_mode == IW_MODE_MASTER) {
> -		printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
> -		       ieee->dev->name);
> +		pr_debug("%s: Master mode not yet supported.\n",
> +			 ieee->dev->name);

FYI 1:

Conversions of
	printk(KERN_DEBUG ...)
to
	pr_debug(...)
are not equivalent.

The first one is always placed into the object code
and emitted when the logging level is set appropriately.

The second one is only emitted if dynamic_debug is enabled
or if a #define DEBUG is set.

You should mention this change in the changelog.

In any case, for this code only, I think it's probably OK.

FYI 2:

There is a script that does these conversions and a few
other things: https://lwn.net/Articles/380161/