Re: [PATCH 1/4] module: implement module_inhibit_unload()

From: Tejun Heo
Date: Mon Sep 24 2007 - 23:38:07 EST

Rusty Russell wrote:
> As stated you cannot protect arbitrary code this way, as you are trying
> to do. I do not think you've broken any of the current code, but I
> cannot tell. You're certainly going to surprise unsuspecting future
> authors.

Can you elaborate a bit? Why can't it protect the code?

> Can you really not figure out the module owner of the sysfs entry to inc
> its use count during this procedure? (__module_get()).

I can but I don't think it's worth the effort. It will involve passing
@owner parameter down through kobject to sysfs but the path is pretty
obscure and thus difficult to test. I think it's too much work for the
users of the API and it will be easy to pass the wrong @owner and go


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