Re: [PATCH 1/19] MUTEX: Introduce simple mutex implementation

Linus Torvalds
2005-12-16T22:41:16Z

On Fri, 16 Dec 2005, Thomas Gleixner wrote:
>
> Therefor, if you want to handle that "init protection" scenario, do not
> use a mutex, because the owner can not be defined at compile -
> allocation time.

Sure it could. We certainly have "init_task", for example. It may or may
not be the right thing to use, of course. Depends on what the situation
is.

> You can still implement (chose a mechanism) a mutex on top - or in case
> of lack of priority inheritance or debugging with exactly the same -
> mechanism as a semaphore, but this does not change the semantical
> difference at all.

"Friends don't let friends use priority inheritance".

Just don't do it. If you really need it, your system is broken anyway.

Linus