Re: Module link

[YH <yh@bizmail.com.au>]

Thanks for all responses. The file was modified from 
drivers/macintosh/therm_adt746x.c, the function call i2c_add_driver() in 
static int __init thermostat_init(void) caused a null point. In fact, 
all i2c related functions were not linked. The i2c-core.c has been built 
in kernel. How does the module therm_adt746x.ko link to i2c? I did not 
see that the module therm_adt746x.ko resolved symbol i2c_add_driver. Or, 
the symbols are resolved during insmod? I guess I try to figure out 
whether this problem is caused by building process in kernel or by 
module loading process in insmod (using BusyBox)?

Thank you.

Jim

Dave C Boutcher wrote:
> On Fri, 7 Jul 2006 15:33:43 +1000 (EST), yh@bizmail.com.au said:
>
> > Thanks Randy. Let me clarify it.
> > I have a driver module (NewSerialModule.ko) and I build it for module
> > load. This driver module uses i2c functions. It was fine to init this
> > module in kernel 2.4 as the i2c functions are exported in i2c Makefile.
> >
> > In kernel 2.6, I loaded this module and got NULL point exception. I
> > checked the module map, all i2c functions are not linked. I also checked
> > i2c, there is no export for i2c in kernel 2.6. So, my question is how can
> > I link the dirvers/i2c to my driver module in drivers/char directory? How
> > to export a directory to be a library such as i2c? In general, how to link
> > another directory functions by a module in kernel 2.6?
>
>
> It is difficult for any of us to offer assistance unless you provide a
> pointer to your source code.
>
> However, I will point out that the i2c functions are exported from
> drivers/i2c/i2c-core.c, so you should make sure you have that module
> either built into your kernel or loaded.
>
> Dave B
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