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Message-ID: <4F74C10B.3040503@zytor.com>
Date: Thu, 29 Mar 2012 13:07:39 -0700
From: "H. Peter Anvin" <hpa@...or.com>
To: Maarten ter Huurne <maarten@...ewalker.org>
CC: linux-kernel@...r.kernel.org
Subject: Re: [PATCH] /dev/mem: Add kernel config option to omit this device.
On 03/29/2012 12:32 PM, Maarten ter Huurne wrote:
> On Thursday 29 March 2012 10:30:14 H. Peter Anvin wrote:
>> On 03/29/2012 10:22 AM, Maarten ter Huurne wrote:
>>> Many systems don't need /dev/mem, so make it optional.
>>> It saves some space on embedded systems.
>>>
>>> Signed-off-by: Maarten ter Huurne <maarten@...ewalker.org>
>>
>> I would like to see it being modular if it is made optional. I think
>> that would be the right thing anyway.
>
> By modular, do you mean splitting off the code from drivers/char/mem.c into
> a new source file?
>
> In mem.c there are several static functions used by more than one device,
> but I think /dev/mem, /dev/kmem and /dev/port are relatively independent of
> the other devices, so splitting off those three would be an option.
>
Yes, splitting them and making it possible to compile them as modules.
And certainly the devices you list above are really quite different
from, say /dev/null or /dev/zero.
-hpa
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