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Date:   Sat, 2 Oct 2021 10:29:33 -0400
From:   Alan Stern <stern@rowland.harvard.edu>
To:     Segher Boessenkool <segher@kernel.crashing.org>
Cc:     "Paul E. McKenney" <paulmck@kernel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        will@kernel.org, Peter Zijlstra <peterz@infradead.org>,
        linux-kernel@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        parri.andrea@gmail.com, boqun.feng@gmail.com, npiggin@gmail.com,
        dhowells@redhat.com, j.alglave@ucl.ac.uk, luc.maranget@inria.fr,
        akiyks@gmail.com, linux-toolchains@vger.kernel.org,
        linux-arch@vger.kernel.org
Subject: Re: [RFC PATCH] LKMM: Add ctrl_dep() macro for control dependency
Message-ID: <20211002142933.GA532982@rowland.harvard.edu>
References: <20210928211507.20335-1-mathieu.desnoyers@efficios.com>
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 <20211001191008.GA16711@gate.crashing.org>
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On Fri, Oct 01, 2021 at 02:10:08PM -0500, Segher Boessenkool wrote:
> Compilers understand you want exactly what you wrote.  If you write
> something other than what you want, you only will get what you want by
> pure luck.

The problem is that at times you _can't_ write what you want because the
language offers no way to express it.

Alan