linux-kernel - Re: [PATCH] jump label: introduce static

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Date:	Wed, 23 Feb 2011 11:11:25 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jason Baron <jbaron@...hat.com>
Cc:	hpa@...or.com, mathieu.desnoyers@...ymtl.ca, rostedt@...dmis.org,
	mingo@...e.hu, tglx@...utronix.de, andi@...stfloor.org,
	roland@...hat.com, rth@...hat.com, masami.hiramatsu.pt@...achi.com,
	fweisbec@...il.com, avi@...hat.com, davem@...emloft.net,
	sam@...nborg.org, ddaney@...iumnetworks.com,
	michael@...erman.id.au, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] jump label: introduce static_branch() interface

On Tue, 2011-02-22 at 17:28 -0500, Jason Baron wrote:
> @@ -33,7 +28,11 @@ struct _ddebug {
>  #define _DPRINTK_FLAGS_PRINT   (1<<0)  /* printk() a message using
> the format */
>  #define _DPRINTK_FLAGS_DEFAULT 0
>         unsigned int flags:8;
> -       char enabled;
> +#ifdef HAVE_JUMP_LABEL
> +       struct jump_label_key enabled;
> +#else
> +       int enabled;
> +#endif
>  } __attribute__((aligned(8)));
>   

Also, didn't you promise Mathieu a comment explaining why dynamic debug
does funny things like this? :-) I mean we all know its because of the
cyclic header stuff involving atomic etc.. but I'm also quite sure we'll
all have forgotten about that in a few weeks time.
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