linux-kernel - Re: New objtool warning..

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Message-ID: <20201217104556.GT3040@hirez.programming.kicks-ass.net>
Date:   Thu, 17 Dec 2020 11:45:56 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: New objtool warning..

On Wed, Dec 16, 2020 at 02:01:58PM -0600, Josh Poimboeuf wrote:
> So this is kind of tricky, because the unreachable() annotation usually
> means "the previous instruction is a dead end".  Most of the time, the
> next instruction -- the one actually pointed to by the annotation -- is
> actually reachable from another path.

*groan*, this is why I ended up sticking a nop in
instrumentation_begin()/_end().