[PATCH 1/2] [PING] Optimize generic spinlock code and use C11 like atomic macros.

[Stefan Liebler]

On 04/25/2017 08:46 AM, Stefan Liebler wrote:
> On 04/18/2017 03:09 PM, Stefan Liebler wrote:
>> On 04/10/2017 01:59 PM, Stefan Liebler wrote:
>>> On 04/09/2017 03:51 PM, Torvald Riegel wrote:
>>>> On Fri, 2017-04-07 at 18:22 +0200, Stefan Liebler wrote:
>>>>> @architecture maintainers:
>>>>> I've added defines of ATOMIC_EXCHANGE_USES_CAS in the architecture
>>>>> specific atomic-machine.h files.
>>>>> See comment in include/atomic.h:
>>>>> /* ATOMIC_EXCHANGE_USES_CAS is equal to 1 if atomic_exchange
>>>>> operations
>>>>>     are implemented based on a CAS loop; otherwise, this is 0 and we
>>>>> assume
>>>>>     that the atomic_exchange operations could provide better
>>>>> performance
>>>>>     than a CAS loop.  */
>>>>>
>>>>> Can review the definition to 0 or 1 in the atomic-machine.h file of
>>>>> your
>>>>> architecture, please?
>>
>>
>> PING
>>
> PING

PING
>>
>>>>
>>>> I think we primarily need feedback from the maintainers of the
>>>> architectures where we're not quite sure.  Let's see how responsive
>>>> everyone is and then decide whether we need to continue pinging some of
>>>> them potentially or whether we have enough information to be able to
>>>> commit the patch.
>>>>
>>> Okay.
>>>
>>> Chris has already replied directly to me.
>>> On 04/07/2017 06:50 PM, Chris Metcalf wrote:
>>>> Thanks, looks good for tilegx/tilepro.
>>>
> Andreas has answered regarding the explicit check of
> ATOMIC_EXCHANGE_USES_CAS in include/atomic.h.
> @Andreas: is m68k okay?
>
> Joseph has replied for mips.
>
> What about the other architectures? Is the definition of
> ATOMIC_EXCHANGE_USES_CAS correct?
>
>>> Bye
>>> Stefan
>>>
>>
>