linux-kernel - Re: odd objtool 'unreachable instruction' warning

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Message-ID: <20251105195103.GR13846@twin.jikos.cz>
Date: Wed, 5 Nov 2025 20:51:03 +0100
From: David Sterba <dsterba@...e.cz>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Josh Poimboeuf <jpoimboe@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alexandre Chartre <alexandre.chartre@...cle.com>
Subject: Re: odd objtool 'unreachable instruction' warning

On Wed, Oct 29, 2025 at 09:17:36AM -0700, Linus Torvalds wrote:
> Now, if objtool disassembly ever gives the kind of good disassembly
> that 'perf report' does - with branches turned into arrows etc - that
> would be lovely, and I'd replace my hacky alias in a heartbeat.

FWIW, 'objdump --visualize-jumps' shows the arrows, with
'--visualize-jumps=extended-color' they're colored and it's readable.