Re: [PATCH 3/3] KVM: x86/vPMU: Add lazy mechanism to release perf_event per vPMC

[Peter Zijlstra]

On Mon, Sep 30, 2019 at 03:22:57PM +0800, Like Xu wrote:
> +     union {
> +             u8 event_count :7; /* the total number of created perf_events */
> +             bool enable_cleanup :1;

That's atrocious, don't ever create a bitfield with base _Bool.

> +     } state;