linux-kernel - Re: [tip: objtool/core] objtool: Add CONFIG_OBJTOOL

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Message-ID: <avueaoqxm4ntqx4wyslgmnnbj5dmlcystkwf5dv6qm74fugjje@j7i62mfrwypi>
Date: Tue, 18 Mar 2025 07:26:03 -0700
From: Josh Poimboeuf <jpoimboe@...hat.com>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-tip-commits@...r.kernel.org, 
	"Peter Zijlstra (Intel)" <peterz@...radead.org>, x86@...nel.org
Subject: Re: [tip: objtool/core] objtool: Add CONFIG_OBJTOOL_WERROR

On Tue, Mar 18, 2025 at 12:51:43PM +0100, Ingo Molnar wrote:
> 
> * Ingo Molnar <mingo@...nel.org> wrote:
> 
> > 
> > My randconfig build tests found this failure of 36 warnings upgraded to 
> > a build failure:
> > 
> >    vmlinux.o: error: objtool: 36 warning(s) upgraded to errors
> > 
> > One thing that stands out in the config is:
> > 
> >   # CONFIG_BUG is not set
> 
> Here's a different build failure, with CONFIG_BUG set:
> 
>   vmlinux.o: error: objtool: 39 warning(s) upgraded to errors

This last error isn't so helpful, what we really need to see is all the
specific warnings before that.

Anyway this config has the same problem as the last one:
CONFIG_TRACE_BRANCH_PROFILING.

> it was the 6th randconfig - so these failures are pretty high 
> frequency.
> 
> config attached.
> 
> I don't think this change is a wise one so close to the v6.15 merge 
> window...

That's fine, I can post a v2 after the merge window.

-- 
Josh