Load module A and B using modprobe. since A willnot be ready immediately, allow B to call in a function in A, say a_register_user() and send in a set of function pointers.
Module A, then after it has done the 'work' as you described it will call a specific function from the function pointer list, called init_done, start_init() or whatever you can to call it and B then knows it is safe to call into module A.
This is a common scheme in the linux kernel and other places.
Amit
l x wrote:
Thanks so much for the information and sorry for not making myself clear.
The details are like this:
- modA.o needs to be loaded first and it will do some
work after been loaded. After the work is done,
- modB.o needs to be loaded.
Is there a system call, something like "load_another_lkm"? If there is one, then we can call it from modA after modA completes its works.
Thanks,
T.
*/"Curran, Dominic" <dcurran@ti.com>/* wrote:
I've never done this but I believe it works like this.
Copy your LKM's to somewhere under the tree:
/lib/modules/<version>
where <version> is the current kernel version ('uname -r').
Then run depmod.
depmod should create the module dependency file. This determines
interdependencies between LKM's.
The module dependency file will live here:
/lib/modules/<version>/modules.dep
Then load your modules using modprobe.
Thus if modA.o depends on modB.o
Then the command:
# modprobe modA.o
...should load modB.o and then modA.o
I'm sure someone will correct me if I'm wrong.
dom
-----Original Message----- *From:* kernelnewbies-bounce@nl.linux.org [mailto:kernelnewbies-bounce@nl.linux.org] *On Behalf Of *l x *Sent:* Friday, May 14, 2004 5:43 PM *To:* kernelnewbies@nl.linux.org *Subject:* Help - how to let a module load another module
Hi,
People usually use insmod to load a module from the
command-line. How can we let a module load another module? Suppose we have module_a.o and module_b.o, how to code module_a,
so running "insmod module_a.o" will cause module_b.o loaded.
Thanks,
T.
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