linux-kernel - Re: Please turn "Cannot use CONFIG_STACK

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Date:   Mon, 13 Feb 2017 14:05:50 -0800
From:   Marc MERLIN <marc@...lins.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Please turn "Cannot use CONFIG_STACK_VALIDATION" into build error

On Mon, Feb 13, 2017 at 04:00:02PM -0600, Josh Poimboeuf wrote:
> On Mon, Feb 13, 2017 at 01:31:32PM -0800, Marc MERLIN wrote:
> > Anyway, after not finding it in xconfig, I editted .config, and did:
> > # CONFIG_STACK_VALIDATION is not set
> > save .config
> > and the next build re-enabled the option.
> > That's what caught me by surprise. Did I do something wrong, or is there an
> > issue there?
> 
> I really don't see how it would be possible for it to come back by
> itself, as it's disabled by default, and no other options select it.
> When I remove it, it stays disabled.
 
Mmmh, you are correct.
I have no idea why/how it got re-enabled yesterday. I'm not seeing this
again today.

> > This would help, although in that case you can even make the warning an
> > error since objtool missing seems to be fatal?
> 
> It doesn't need to be fatal though.  It should just be a warning and the
> build should succeed, like it does when building the kernel.

Agreed, that would be even better.

Thanks for looking at that.
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/