linux-kernel - Re: [PATCH] psi: avoid divide-by-zero crash inside virtual machines

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Message-Id: <20190214132244.8a26cc78cda17abd625534dc@linux-foundation.org>
Date:   Thu, 14 Feb 2019 13:22:44 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Łukasz Siudut <lsiudut@...com>,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH] psi: avoid divide-by-zero crash inside virtual machines

On Thu, 14 Feb 2019 15:53:43 -0500 Johannes Weiner <hannes@...xchg.org> wrote:

> 
> 	if (now < expires)
> 
> vs.
> 
> 	if (time_before64(now, expires))
> 
> These macros always have me double check the argument order.

Yeah, me too.