linux-kernel - Re: [patch 5/8] Immediate Values

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Date:	Sat, 14 Jul 2007 17:26:19 +0100
From:	Christoph Hellwig <hch@...radead.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	prasanna@...ibm.com, ananth@...ibm.com,
	anil.s.keshavamurthy@...el.com, davem@...emloft.net
Subject: Re: [patch 5/8] Immediate Values - kprobe header fix

On Fri, Jul 13, 2007 at 09:24:44PM -0400, Mathieu Desnoyers wrote:
> Since the immediate values depend on the same int3 handler as kprobes implements
> for i386, we have to get architecture specific defines available for the kprobes
> trap handler (especially restore_interrupts()) wven when CONFIG_KPROBES is not
> selected.
> 
> That kind of ifdef around a whole header does not make sense in the first place
> anyway.
> 
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
> CC: prasanna@...ibm.com
> CC: ananth@...ibm.com
> CC: anil.s.keshavamurthy@...el.com
> CC: davem@...emloft.net
> ---
>  include/linux/kprobes.h |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux-2.6-lttng/include/linux/kprobes.h
> ===================================================================
> --- linux-2.6-lttng.orig/include/linux/kprobes.h	2007-07-13 18:47:57.000000000 -0400
> +++ linux-2.6-lttng/include/linux/kprobes.h	2007-07-13 18:48:45.000000000 -0400
> @@ -36,9 +36,9 @@
>  #include <linux/spinlock.h>
>  #include <linux/rcupdate.h>
>  
> -#ifdef CONFIG_KPROBES
>  #include <asm/kprobes.h>

but this one isn't available on architectures that don't have kprobes,
so you can't include linux/kprobes.h in generic code without ifdef
protection anymore.

I'd say move the code to asm/kdebug.h if it's need by more than just
kprobes.

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