On Mar 24, 2008, at 3:32 PM, Carlo Bertoldi wrote:
Ok, I did that way because rummaging in kernel sources I found a
file (drivers/mtd/devices/docprobe.c, kernel version 2.6.18) with
those instructions. So here what I'm doing right now in the second
module:
extern void write_seq_to_store(void);
[..]
init function
{
void (*my_write) (void) = NULL;
if ( request_module("modulo_seq") < 0) {
printk(KERN_INFO "Unable to load module modulo_seq\n");
return -1;
}
my_write = symbol_request(write_seq_to_store);
write_seq_to_store it's implemented by modulo_seq.
You also will need to ensure that the module doing the exporting is
loaded successfully before you try to use the function and that
it's not used again after unloading it.
Yes. So now my problem is: where do I place the above code in the
kernel, such that it's executed early in the boot process?
I'm afraid I don't understand. Why do you need it to load "early"?
It shouldn't need to load before you intend to call the function the
first time. As long as that's not at tasklet or interrupt context you
can put the code above before you call my_write() the first time.
Is there some reason it needs to happen before that?
-Mike
--
To unsubscribe from this list: send an email with
"unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
Please read the FAQ at http://kernelnewbies.org/FAQ
