linux-kernel - Re: [PATCH] sysrq, intel

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Message-Id: <20090514161747.e8683c9e.akpm@linux-foundation.org>
Date:	Thu, 14 May 2009 16:17:47 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jason Wessel <jason.wessel@...driver.com>
Cc:	jbarnes@...tuousgeek.org, eric@...olt.net, airlied@...hat.com,
	randy.dunlap@...cle.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sysrq, intel_fb: fix sysrq g collision

On Thu, 14 May 2009 17:58:11 -0500
Jason Wessel <jason.wessel@...driver.com> wrote:

> Commit 79e539453b34e35f39299a899d263b0a1f1670bd introduced a
> regression where you cannot use sysrq 'g' to enter kgdb.  The solution
> is to move the intel fb sysrq over to V for video instead of G for
> graphics.  The SMP VOYAGER code to register for the sysrq-v is not
> anywhere to be found in the mainline kernel, so the comments in the
> code were cleaned up as well.
> 
> This patch also cleans up the sysrq definitions for kgdb to make it
> generic for the kernel debugger, such that the sysrq 'g' can be used
> in the future to enter a gdbstub or another kernel debugger.
> 

I was looking at that a week or two ago.

> 
> --- a/drivers/char/sysrq.c
> +++ b/drivers/char/sysrq.c
> @@ -406,7 +406,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = {
>  	&sysrq_showlocks_op,		/* d */
>  	&sysrq_term_op,			/* e */
>  	&sysrq_moom_op,			/* f */
> -	/* g: May be registered by ppc for kgdb */
> +	/* g: May be registered for the kernel debugger */

And I made the mistake of believing the comment :(
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