linux-kernel - Re: Suggestion: LKM should be able to add system call for itself

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Date:	Mon, 7 Jul 2008 00:01:28 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	"Jinkai Gao" <mickeygjk@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Suggestion: LKM should be able to add system call for itself

On Mon, 7 Jul 2008 01:09:30 -0400
"Jinkai Gao" <mickeygjk@...il.com> wrote:

> Above is to demonstrate that LKM is extension to kernel, and the
> system calls should be able to extend as long as the kernel is
> extending. So The LKM should be able to define its own user interface
> by adding new system call for itself. 

Since we promise a stable ABI to userspace, this is a bit of a problem.

But... look today, we already have various system calls implemented by
modules. (example: sys_nfsservctl)
but to make it fully dynamic? Not a good idea... nobody would be able
to program to it.




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