Re: kernel space access to user space functions

["H. Peter Anvin" <hpa@zytor.com>]

Followup to:  <3DE91CBF.295C1491@bigpond.net.au>
By author:    Chris Ison <cisos@bigpond.net.au>
In newsgroup: linux.dev.kernel
>
> I realize I asked this previously, but the answer given was not to the
> question I asked.
> 
> How can I get a kernel module to call a function within a program?
> 

You can't.

> The reason being I am creating a software midi driver and already have a
> small program that does what I want the driver to do, problem is all the
> math in the program is floating point.

There are functions now in the kernel (kernel_fpu_begin() and
kernel_fpu_end()) to allow the use of floating point inside the
kernel.

> What I would like to do, is be able to run the program, and have the
> kernel software midi driver call a function within the program to que up
> midi events, and have the program do all the hard work of the wavetable
> synth.
> 
> This way, any improvements to the software don't have to be translated
> to the driver, and visa versa.
> 
> How can I make this happen. And please give an example.

You can't.

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>