linux-kernel - Re: [PATCH] net: optimize cmpxchg in ip_idents

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Date:   Wed, 22 Jan 2020 09:49:02 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     Shaokun Zhang <zhangshaokun@...ilicon.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, jinyuqi@...wei.com,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        guoyang2@...wei.com, Will Deacon <will@...nel.org>
Subject: Re: [PATCH] net: optimize cmpxchg in ip_idents_reserve

On Sat, Jan 18, 2020 at 08:12:48PM -0800, Eric Dumazet wrote:
> Instead the changelog should be explaining why the revert is now safe.

FWIW, it was always safe, UBSAN was just buggy.