Re: [Xen-devel] [PATCH v6 02/18] Add cmpxchg16b support for x86-64

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 25.08.15 at 03:57, <feng.wu@xxxxxxxxx> wrote:
> This patch adds cmpxchg16b support for x86-64, so software
> can perform 128-bit atomic write/read.
> 
> CC: Keir Fraser <keir@xxxxxxx>
> CC: Jan Beulich <jbeulich@xxxxxxxx>
> CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
> ---
> v6:
> - Fix a typo
> 
> v5:
> - Change back the parameters of __cmpxchg16b() to __uint128_t *
> - Remove pointless cast for 'ptr'
> - Remove pointless parentheses
> - Use A constraint for the output

There are a few comments I had on v4 which neither have been
addressed verbally nor have got incorporated into the patch. See
http://lists.xenproject.org/archives/html/xen-devel/2015-07/msg04694.html

Jan


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