Re: [Xen-devel] [PATCH 2/7] common: avoid atomic read-modify-write accesses in map_vcpu_info()

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 11.03.19 at 18:53, <julien.grall@xxxxxxx> wrote:
> Hi,
> 
> On 11/03/2019 16:50, Andrew Cooper wrote:
>> On 11/03/2019 16:48, Jan Beulich wrote:
>>> There's no need to set the evtchn_pending_sel bits one by one. Simply
>>> write full words with all ones.
>>>
>>> For Arm this requires extending write_atomic() to also handle 64-bit
>>> values; for symmetry read_atomic() gets adjusted as well.
>>>
>>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> 
>> Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
>> 
>> (I'll leave the ARM assembly to Julien to check over)
> 
> Reviewed-by: Julien Grall <julien.grall@xxxxxxx>
> 
> I can queue this series in my next branch once it is fully acked.

I was meaning to apply right away whatever initial parts of it are
fully acked, as this isn't a major change, and it doesn't have a
significant risk of conflicts with potential last minute changes for
4.12.

Jan



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