Subject: Re: [PATCH] Configure out DMI scanning code
From: Matt Mackall <mpm@selenic.com>
To: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@elte.hu>,
       Thomas Gleixner <tglx@linutronix.de>, "H. Anvin" <hpa@zytor.com>,
       Linux-tiny@selenic.com, linux-kernel@vger.kernel.org
In-Reply-To: <20080211175844.3358a49b@crazy>
References: <20080211175844.3358a49b@crazy>
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Date: Mon, 11 Feb 2008 13:01:18 -0600
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On Mon, 2008-02-11 at 17:58 +0100, Thomas Petazzoni wrote:
> Hi,
> 
> The enclosed patch allows to remove the DMI scanning code when
> CONFIG_EMBEDDED is defined. It's basically the dma_blacklist patch of
> Linux-Tiny ported to 2.6.25-rc1, with the required modifications. It
> allows to remove ~10k from the kernel code/data size.

Looks ok. Please preserve original authorship (ie me) in some fashion in
your description.

> On top of this patch, I've tested if removing the big dmi tables in the
> code (for example in arch/x86/kernel/reboot.c) would allow to make more
> space optimizations. However, it seems that simply defining
> dmi_check_system() to an empty static inlined function already allows
> gcc to optimize out the dmi tables, because there are not present in
> the code. Is that possible, or is my understanding incorrect ?

That's possible with modern gccs, yes.

-- 
Mathematics is the supreme nostalgia of our time.

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