linux-kernel - Re: objtool warning for next-20221118

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Message-ID: <Y3thrQxfcvZSXFlr@hirez.programming.kicks-ass.net>
Date:   Mon, 21 Nov 2022 12:31:57 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     jpoimboe@...nel.org, sfr@...b.auug.org.au,
        linux-kernel@...r.kernel.org
Subject: Re: objtool warning for next-20221118

On Sun, Nov 20, 2022 at 08:07:36PM -0800, Paul E. McKenney wrote:
> Hello!
> 
> I have started getting this from rcutorture scenario TREE09:
> 
> vmlinux.o: warning: objtool: do_idle+0x25f: unreachable instruction
> 
> Should I be worried?

Typically not a scary warning that.

> If so, please let me know what additional information you need.

.config and compiler version so that I might recreate and observe what
it's complaining about would help :-)