# Re: \[PATCH 3/3\] userfaultfd: non-cooperative: allow synchronous EVENT\_REMOVE

- From: Pavel Emelyanov \<hidden\>
- Date: 2018-02-28 08:21:11 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2018/02/5194753
- Thread: https://ratatoskr.run/linux-mm/2018/02/5194751/t.md

```text

> @@ -52,6 +53,7 @@
>  #define _UFFDIO_WAKE			(0x02)
>  #define _UFFDIO_COPY			(0x03)
>  #define _UFFDIO_ZEROPAGE		(0x04)
> +#define _UFFDIO_WAKE_SYNC_EVENT		(0x05)

Excuse my ignorance, but what's the difference between UFFDIO_WAKE and UFFDIO_WAKE_SYNC_EVENT?

-- Pavel
```