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SubjectRe: [PATCH for 4.16 07/10] x86: Introduce sync_core_before_usermode (v2)
On Mon, 15 Jan 2018, Mathieu Desnoyers wrote:

> Introduce an architecture function that ensures the current CPU
> issues a core serializing instruction before returning to usermode.
>
> This is needed for the membarrier "sync_core" command.
>
> Architectures defining the sync_core_before_usermode() static inline
> need to select ARCH_HAS_SYNC_CORE_BEFORE_USERMODE.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

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