On 8/29/07, Jan Kiszka <[EMAIL PROTECTED]> wrote:
> Mathieu JOINIE-MAURIN wrote:
> > The application I used is a small controller for robot developped by people
> > in the lab. Before it used to be in RTAI. But now they are trying to use
> > Xenomai. The application is splitted in two parts:
> > the user side which saves data, manages interfaces and the kernel module
> > which realise all the real time tisk (sampling, writing to electronic card,
> > controler).
> > The communications between the two is made by 5 pipes (command, parameters,
> > acknowledgment, save, status).
> >
> > This is why i need to make my sqrt() function (of double variables) into
> > my kernel modul part.
>
> Given that this is also a "small" application, I bet it will be far
> easier for you to port it to user-space (POSIX or native skin) than
> porting a math lib into kernel space.
Compiling a libm in kernel-space is not hard at all, especially since
a libm does not use any system call. But Mathieu could even do a
simpler thing: if the only math function used is sqrt, he could simply
add an implementation of this function into his kernel module.
--
Gilles Chanteperdrix
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