How to use Kernel level mutex in FreeBSD 4.8

[jitendra pande]

Hi,
 
I am trying to use kernle level mutex in my driver for FreeBSD 4.8.  I tried searching for kernel level mutex but couldn't find any information on the same.
 
The kernel level mutex functions mtx_lock(..), mutex(..), mtx_init(..) and other mtx_ functions are available from FreeBSD 5.0 onwards and not in FreeBSD 4.8.
 
Kindly adavice me how should i proceed.
 
Also is there anything like Gaint lock in FreeBSD 4.8. If so then how can i use it.
 
Any early reply will be of great help.
 
Thanks in advance
Jitendra
 


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