[PATCH 05/11] qspinlock: Optimize for smaller NR_CPUS

Paolo Bonzini
2014-06-18T11:39:52Z

Il 15/06/2014 14:47, Peter Zijlstra ha scritto:
>
> -	for (;;) {
> -		new = (val & ~_Q_PENDING_MASK) | _Q_LOCKED_VAL;
> -
> -		old = atomic_cmpxchg(&lock->val, val, new);
> -		if (old == val)
> -			break;
> -
> -		val = old;
> -	}
> +	clear_pending_set_locked(lock, val);
>  	return;


Might as well add clear_pending_set_locked already in patch 3.

Paolo