Module loading and Unloading

"Vivek Kumar Gupta" <gkvivek@xxxxxxxxx> · Tue, 27 May 2008 18:08:42 +0530

I have 3 kernel modules (KO) A, B, C. And one
symbol is exported from A to B and C modules. I have to insmod A, and then I
can do insmod's for B & C. 

Now my problem is that I have to do
insmod's for B and C with out A.

My client is asking me both the approaches.
That is Modules B and C should be loaded with and without A. 

For this I want to check the Symbol in the
code of B and C. if it is there in kernel symbol then its ok, else it should
pick its own function. (this can only happen if kernel don’t complain of
kernel symbol)

So what I should do to that symbol which I
have exported in A.

 Is there a way of exporting
     symbol kernel? 
 Or is there any way which I can
     check if symbol is present in the kernel in c code?
 Or Can I load the Module A from
     Module B [in c code] (without using modprobe).

Thanks
in advance, your help will really help me in coming out.

Regards

Vivek