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

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Message-ID: <20170213220002.2hqnarjvx3ev2nl3@treble>
Date:   Mon, 13 Feb 2017 16:00:02 -0600
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Marc MERLIN <marc@...lins.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: Please turn "Cannot use CONFIG_STACK_VALIDATION" into build error

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.

> > Ideally the same warning should be printed when building OOT modules.
> > I'll try to figure out if there's a way to do that it.
> 
> 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.

-- 
Josh