add missing content to locking.9 ?

[Ed Schouten]

Hi Benjamin,

* Benjamin Kaduk <kaduk at MIT.EDU> wrote:
> +.Tn POSIX
> +semaphores provide ...

it looks like you described the semaphores that are used in userspace.
The Semaphores section of the locking(9) man page should describe
in-kernel semaphores (kern_sema.c). They are implemented by a mutex and
a conditional variable.

Even though it's nice to have some utility functions in our kernel, I
always wondered why we have them. There isn't a lot of code in the tree
that uses them...

-- 
 Ed Schouten <ed at 80386.nl>
 WWW: http://80386.nl/
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