Re: [PATCH v14 05/12] cpuset: Add an error state to cpuset.sched.partition

[Peter Zijlstra]

On Mon, Oct 15, 2018 at 04:29:30PM -0400, Waiman Long wrote:
> +				spin_lock_irq(&callback_lock);
> +				clear_bit(CS_CPU_EXCLUSIVE, &cp->flags);
> +				spin_unlock_irq(&callback_lock);

A single atomic bitop wrapped in a spinlock..  maybe it is correct, but
it looks suspicous.