On Thu, 13 Dec 2012 23:50:23 +0100 Frederic Weisbecker <fweis...@gmail.com> wrote:
> > > >> + * This call supports re-entrancy. > > > > Presumably the explanation for user_exit() applies here. > > Not sure what you mean here. It's unclear what it means to say "user_enter() supports reentrancy". I mean, zillions of kernel functions are surely reentrant - so what? It appears that you had something in mind when pointing this out, but what was it? The comment over user_exit() appears to tell us. > > It's mainly this bit which makes me wonder why the code is in lib/. Is > > there any conceivable prospect that any other subsystem will use this > > code for anything? > > So that's because of that cputime accounting on dynticks CPUs which > will need to know about user/kernel transitions. I'm preparing that > for the 3.9 merge window. Oh. That's really the entire reason for the patch and should have been in the changelog! -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
