linux-kernel - Re: [PATCH v2 1/3] mtd: mtdoops: change printk() to counterpart pr

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Message-ID: <62acd27e418ff202ef2ffedd2474ae7f53f93368.camel@perches.com>
Date:   Fri, 07 Oct 2022 08:43:39 -0700
From:   Joe Perches <joe@...ches.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Ray Zhang <sgzhang@...gle.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] mtd: mtdoops: change printk() to counterpart pr_
 functions

On Fri, 2022-10-07 at 09:52 +0200, Miquel Raynal wrote:
> Hi Joe, Ray,
> 
> joe@...ches.com wrote on Fri, 07 Oct 2022 00:09:26 -0700:
> 
> > On Fri, 2022-10-07 at 06:50 +0000, Ray Zhang wrote:
> > > To comply with latest kernel code requirement, change printk() to
> > > counterpart pr_ functions in mtdoops driver:
> > > - change printk(INFO) to pr_info()
> > > - change printk(DEBUG) to pr_debug()  
> > 
> > There is a different behavior with printk(KERN_DEBUG to pr_debug(
> > as pr_debug is a no-op unless dynamic debugging is enabled or
> > DEBUG is defined.
> 
> I didn't know about this difference. I was expecting printk(KERN_DEBUG)
> to behave the same as pr_debug/dev_dbg.

No worries.  Most people do not know this trivia.

I just wanted to inform in case it matters here.
Likely it does not matter.

> But honestly in this driver I feel fine changing the printk(KERN_DEBUG)
> into pr_debug().

Your choice...