linux-kernel - Re: [RFC][PATCH v2 20/19] kbuild/objtool: Add objtool-vmlinux.o pass

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Message-ID: <20200318183425.54xgldze5tfdnugz@treble>
Date:   Wed, 18 Mar 2020 13:34:25 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org, x86@...nel.org,
        mhiramat@...nel.org, mbenes@...e.cz, brgerst@...il.com
Subject: Re: [RFC][PATCH v2 20/19] kbuild/objtool: Add objtool-vmlinux.o pass

On Wed, Mar 18, 2020 at 02:18:45PM +0100, Peter Zijlstra wrote:
> 
> This seems to 'work', must be perfect etc..
> 
> ---
> 
> Subject: kbuild/objtool: Add objtool-vmlinux.o pass
> From: Peter Zijlstra <peterz@...radead.org>
> Date: Wed Mar 18 13:33:54 CET 2020
> 
> Now that objtool is capable of processing vmlinux.o and actually has
> something useful to do there, (conditionally) add it to the final link
> pass.
> 
> This will increase build time by a few seconds.

This looks fine (with the -z fix), but I'm guessing you haven't tried it
on an allyesconfig kernel yet?  For example I'd expect the crypto code
to give trouble.

I actually have some code to fix that stashed away somewhere...

-- 
Josh