Re: newbie needs help with modules

[Geert U. <ge...@li...>]

On Sat, 29 Jul 2000 fh...@at... wrote:
> I decided to try developing my driver projects as modules in order to save
> reboot cycles.  When I do this, trying to follow the module programming
> advice I got, I get unresolved symbols.  How do I get rid of these?  These
> symbols appear to be routines burried in the kernel various places. 

General solution: add `EXPORT_SYMBOL(unknown_symbol)' to some kernel source
file.

> The PowerUP SCSI module:
> 
> 53c770.o: unresolved symbol virt_to_phys

virt_to_phys() is an inline function (see include/asm-ppc/io.h), so this
should not happen.

 1. Does the compiler complain about functions without a prototype? Many
    functions are inline, but of course they are defined if you include the
    correct header files only.
 2. Do you compile with optimization? If not, enable optimization.
 3. Do you compile with -D__KERNEL__? virt_to_phys() is defined inside
    #idef __KERNEL_/#endif

The same is true for many other symbols.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@li...

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds