Very Computer

following is a simple code i have written to queue a task.  the code
gets compiled but while inserting it gives the error

unresolved symbol tqueue_lock

I have included a variety of header files.... do i need to give some
compile time linking ? the tqueue_lock does not exit in my symbol
table (ksyms -a) . how do i put that in it ?

*************************************************************************
#define MODULE
#include<linux/module.h>
#include<linux/sched.h>
#include<linux/tqueue.h>
#include<linux/netdevice.h>
#include<linux/spinlock.h>
#include<linux/param.h>
#include<linux/interrupt.h>

  struct tq_struct mytask1,mytask2;

void print_mess1()
{

        printk("<1> in timer function mess1\n");

Quote:}

void print_mess2()
{

        printk("<1> in timer function mess2\n");

Quote:}

int put_task()
{

/*        mytask1.routine=print_mess1;

        mark_bh(TIMER_BH);

        queue_task(&mytask1,&tq_timer);
*/
        mytask2.routine=print_mess2;
        mytask2.data=NULL;
        mark_bh(IMMEDIATE_BH);

        queue_task(&mytask2,&tq_immediate);

         return 0;

Quote:}

 int init_module(void)
 {

        int i;
        printk("<1> inserting module for task\n");

        i = put_task();

        return 0;

  }

  void cleanup_module(void)
  {

     printk("<1> unloading today\n");

  }

I would replace that line with these six lines:

#ifndef __KERNEL__
#define __KERNEL__
#endif
#ifndef MODULE
#define MODULE
#endif

But I don't think that is the real problem. Which
kernel version do you use? Are you compiling the
module against the correct header files? Do you
remember to compile with optimization? (-O2) This
might also be a symbol version problem, but I'm
not sure how to deal with them.

--
Kasper Dupont

Quote:>But I don't think that is the real problem. Which

kernel version do you use?
MY KERNEL VERSION IS 2.4.2 ,

Quote:> Are you compiling themodule against the correct header files?

I AM COMPILING AGAINST ALL THE RELEVANT HEADER FILES.

Quote:> Do you remember to compile with optimization? (-O2)

I CUD NOT GET THIS ...CUD U PLEASE ELABORATE.!

Quote:>This might also be a symbol version problem, but I'm

not sure how to deal with them.

Hi andy,

Could it be that you
- use a distribution holding a seperate copy of the kernel header files
in /usr/include/linux and
- does define CONFIG_SMP in /usr/include/linux/autoconf.h?

You are running a uniprocessor kernel (tqueue_lock not defined, nor
exported; see /usr/src/linux/kernel/ksyms.c for later). But in above
case you compile your module for a SMP system. Use following for
compiling your module then:

gcc -I/usr/src/linux/include -D__KERNEL__ -DMODULE -O2 -c yoursource.c

This should convince the compiler to look at the right place for the
header files.

Michael