[PATCH v2 03/23] cpu/hotplug: Avoid busy-polling on archs where cpu_relax() is a no-op

[David Woodhouse]

On Fri, 2026-10-09 at 11:07 +0100, Will Deacon wrote:
> Change cpuhp_ap_sync_alive() to poll using atomic_cond_read_relaxed()

relaxed.

...

> +       atomic_cond_read_acquire(st, VAL == SYNC_STATE_SHOULD_ONLINE);

acquire.
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