From mboxrd@z Thu Jan  1 00:00:00 1970
From: j.neuschaefer@gmx.net (Jonathan =?utf-8?Q?Neusch=C3=A4fer?=)
Date: Wed, 19 Dec 2012 21:52:48 +0100
Subject: sysfs: pass function pointers to kernel (not just a value
	through attribute)
In-Reply-To: <CAER6CkfzRtH2pG1g8pn8qohO7KSdESPNKZwFaxA73OAUWxFukg@mail.gmail.com>
References: <CAER6CkfzRtH2pG1g8pn8qohO7KSdESPNKZwFaxA73OAUWxFukg@mail.gmail.com>
Message-ID: <20121219205248.GD3158@debian.debian>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

On Mon, Dec 17, 2012 at 10:11:46AM -0500, Terry Hsu wrote:
> Hello everyone,
> 
> I am looking for some mechanism for userspace tasks to pass certain
> functions to kernel and let the kernel execute these functions on behalf of
> userspace tasks. I know that sysfs can be used with kobject embedded into
> internal kernel structure to access kernel variables. But is there anyway
> for userspace tasks to pass a function to kernel to execute through sysfs?
> 
> PS: adding syscall in the kernel can certainly satisfy my needs but it is
> less favorable because the new kernel service I want to add is not that
> general to be added as a new syscall.
> 
> Thanks in advance!
> T

You might want to use plain old kernel modules, after all.

Greetings,
Jonathan Neusch?fer