linux-kernel - Re: [PATCH 6/7] xen/evtch: use smp barriers for user event ring

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Message-ID: <2d354cad-3413-a416-0bc1-01d03e1f41cd@citrix.com>
Date:   Mon, 8 Feb 2021 09:44:00 +0000
From:   Andrew Cooper <andrew.cooper3@...rix.com>
To:     Juergen Gross <jgross@...e.com>, <xen-devel@...ts.xenproject.org>,
        <linux-kernel@...r.kernel.org>
CC:     Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>
Subject: Re: [PATCH 6/7] xen/evtch: use smp barriers for user event ring

On 06/02/2021 10:49, Juergen Gross wrote:
> The ring buffer for user events is used in the local system only, so
> smp barriers are fine for ensuring consistency.
>
> Reported-by: Andrew Cooper <andrew.cooper3@...rix.com>
> Signed-off-by: Juergen Gross <jgross@...e.com>

These need to be virt_* to not break in UP builds (on non-x86).

~Andrew