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Re: [PATCH v10 1/5] xen/console: use ACCESS_ONCE for console_rx

To: Stefano Stabellini <stefano.stabellini@xxxxxxx>
From: dmukhin@xxxxxxx
Date: Wed, 4 Feb 2026 18:13:04 -0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, grygorii_strashko@xxxxxxxx, anthony.perard@xxxxxxxxxx, michal.orzel@xxxxxxx, julien@xxxxxxx, roger.pau@xxxxxxxxxx, jason.andryuk@xxxxxxx, victorm.lira@xxxxxxx, andrew.cooper3@xxxxxxxxxx, jbeulich@xxxxxxxx, sstabellini@xxxxxxxxxx
Delivery-date: Thu, 05 Feb 2026 02:13:07 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On Wed, Feb 04, 2026 at 03:37:08PM -0800, Stefano Stabellini wrote:
> There can be concurrent reads and writes to the console_rx variable so
> it is prudent to use ACCESS_ONCE.
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
> Acked-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Denis Mukhin <dmukhin@xxxxxxxx>

References:
- [PATCH v10 0/5] xen: console_io for dom0less guests
  - From: Stefano Stabellini
- [PATCH v10 1/5] xen/console: use ACCESS_ONCE for console_rx
  - From: Stefano Stabellini

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