Re: [PATCH v2 0/2] MR9178: ntdll: Use ReadPointerAcquire to get pointer value in RtlRunOnceBeginInitialize

[Jinoh Kang (＠iamahuman)]

Jinoh Kang (@iamahuman) commented about dlls/ntdll/sync.c:
>  for (;;)
>  {
>      ULONG_PTR val = (ULONG_PTR)once->Ptr;

```suggestion:-0+0
        ULONG_PTR val = (ULONG_PTR)ReadPointerAcquire( &once->Ptr );
```

`RTL_RUN_ONCE_ASYNC` permits multiple threads to race to completion. Non-atomic read here may lead to data race, and lack of ordering if other thread has already completed the initialization (run once).