How to use Kernel level mutex in FreeBSD 4.8

[Dag-ErlingSmørgrav]

jitendra pande <jpande_techinfo at yahoo.com> writes:
> 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 FreeBSD 4 kernel is single-threaded.  You don't need locking
except to protect against interrupts (see spl(9))

DES
-- 
Dag-Erling Smørgrav - des at des.no