linux-kernel - Re: [PATCH] lib/vsprintf: add %pT[C012] format specifier

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Message-ID: <CAMuHMdWfi4mSQLA01_fYrs1ybQ5YysO2EF4q1EBNy+7nbKXN6g@mail.gmail.com>
Date:	Sat, 28 Dec 2013 20:25:45 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	Jiri Kosina <jkosina@...e.cz>, Joe Perches <joe@...ches.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] lib/vsprintf: add %pT[C012] format specifier

On Sat, Dec 28, 2013 at 8:25 PM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
>> Is any of the "\x" (backslash + character) unused and thus available?
>
> I guess control characters would work.
>
> #define PRINTK_COMM     "\001"

Not that one, cfr. include/linux/kern_levels.h ;-)

> #define PRINTK_PID      "\002"
> #define PRINTK_TASK_ID  "\003"  /* "comm:pid" */
>
>         printk(PRINTK_TASK_ID ": hair on fire\n");
>
> It's certainly compact.  I doubt if there's any existing code which
> deliberately prints control chars?

But the rest looks OK to me.

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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