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Re: [Xen-devel] [PATCH v7 1/5] xen: introduce smp_mb__[after|before]_atomic() barriers

To: Juergen Gross <jgross@xxxxxxxx>
From: Jan Beulich <jbeulich@xxxxxxxx>
Date: Wed, 25 Mar 2020 14:17:20 +0100
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Wei Liu <wl@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
Delivery-date: Wed, 25 Mar 2020 13:17:45 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 25.03.2020 11:55, Juergen Gross wrote:
> When using atomic variables for synchronization barriers are needed
> to ensure proper data serialization. Introduce smp_mb__before_atomic()
> and smp_mb__after_atomic() as in the Linux kernel for that purpose.
> 
> Use the same definitions as in the Linux kernel.
> 
> Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>

Acked-by: Jan Beulich <jbeulich@xxxxxxxx>

References:
- [Xen-devel] [PATCH v7 0/5] xen/rcu: let rcu work better with core scheduling
  - From: Juergen Gross
- [Xen-devel] [PATCH v7 1/5] xen: introduce smp_mb__[after|before]_atomic() barriers
  - From: Juergen Gross

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