Re: [PATCH] EDAC: core EDAC support code

Al Viro
2006-03-06T22:24:04Z

On Mon, Mar 06, 2006 at 01:53:44PM -0800, Greg KH wrote:
> > rmmod your_turd </sys/spew/from/your_turd
> > and there you go. rmmod can _NOT_ wait for sysfs references to go away.
>
> To be fair, the only part of the kernel that supports the above process,
> is the network stack. And they implemented a special kind of lock to
> handle just this kind of thing.
>
> That is not something that I want the rest of the kernel to have to use.
> If your code blocks when doing the above thing, that's fine with me.

One word: fail. With -EBUSY.

> Note, you better have the module owner reference right for the above to
> not oops the kernel, deadlock is fine.

Never is.

> There is no rule that we _have_
> to allow rmmod to always succeed.

Quite so, which means we can have it fail saying that module removal has
failed. Deadlock is not the same thing.