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SubjectRe: [PATCH RFC 02/12] x86/ticketlock: convert spin loop to C
  On 08/06/2010 05:43 AM, Jan Beulich wrote:
> You certainly mean "the compiler currently treats this as being:" - I
> don't think there's a guarantee it'll always be doing so.
>
>> for (;;) {
>> if (inc.tickets.head == inc.tickets.tail)
>> goto out;
>> ...
>> }
>> out: barrier();
>> }
>>
>> (Which would probably be a reasonable way to clarify the code.)
> I therefore think it needs to be written this way.

Agreed.

J


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