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

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Date:	Tue, 20 Mar 2012 10:27:38 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	David Miller <davem@...emloft.net>
Cc:	Valdis.Kletnieks@...edu, 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>

On Tue, Mar 20, 2012 at 08:10, David Miller <davem@...emloft.net> wrote:
> 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

And for pr_debug(), there's even more, cfr. CONFIG_DYNAMIC_DEBUG.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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