Re: Modules loading modules?

[Paul Goyette <paul%whooppee.com@localhost>]

On Mon, 2 Aug 2010, Masao Uebayashi wrote:

>     mutex_owned(mtx)
>
>           ...
>
>           mutex_owned() is provided for making diagnostic checks to verify
>           that a lock is held.  For example:
>
>                   KASSERT(mutex_owned(&driver_lock));
>
>           It should not be used to make locking decisions at run time, or to
>           verify that a lock is not held.
>
> Thus you can't use it for your decision.

Yes, I did read the mutex(9) man page.

However, your assertion is at odds with pooka's suggestion, from
http://mail-index.netbsd.org/tech-kern/2010/08/01/msg008632.html

> Good point.  I think it's ok to do:
>
>   if (mutex_owned(mtx))
>     cnt++
>   else
>     lock



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