On Fri, Jul 6, 2012 at 11:42 AM, Gustavo da Silva
<gustavodasilva@gmail.com> wrote:
>
> And another question:
>
> Where are the file "unistd_32.h"?! I'm not founding it in the
> "arch/x86/include/asm/" directory!!

I think you can answer this for yourself:

  $ sudo updatedb && locate unistd_32.h

or

  $ cd kernel-tree && find . -name "unistd_32.h"

Mine is here (for x86):

./arch/x86/include/generated/asm/unistd_32.h

Welcome to kernel-land :-)
Ezequiel.