linux-kernel - Re: [PATCH 2/9] ext4: Use pr_fmt and pr

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Message-Id: <20120320.031001.1532841232287663716.davem@davemloft.net>
Date:	Tue, 20 Mar 2012 03:10:01 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	Valdis.Kletnieks@...edu
Cc:	joe@...ches.com, tytso@....edu, anca.emanuel@...il.com,
	adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/9] ext4: Use pr_fmt and pr_<level>

From: Valdis.Kletnieks@...edu
Date: Tue, 20 Mar 2012 01:46:06 -0400

> OK. Say I'm a scraper.  How do I distinguish between:
> 
> pr_info("foo");
> printk(KERN_INFO "foo");
> 
> Oh my. seems that both result in exactly the same thing ending up in the
> dmesg buffer

No it doesn't result in the same output, read the definitions again.

pr_info can be influenced by pr_fmt, plain printk cannot


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