> You should add -O2 option during compile your program.
> Example: cc -O2 -o example example.c

Adolf, this is my command line, 
gcc -o artur -O2 -I/usr/src/linux/include/linux artur.c

>       im getting this message (segmentation fault) when i try to run a
> program
>       with a simple
> 
>       readb(0x02f8)
> 
>       in it.

and this is the program

#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/cons.h>
#include <asm/io.h>

#define SER_PORT 0x02f8

main()
{
   int i,n;
           
   for (i = 0; i < 100; i++)
      n = readb(SER_PORT);

}

> 
>       whats wrong?
> 
>       thanks,
>       Art.

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