Re: [PATCH] cpumask: introduce new API, without changing anything

[Andrew Morton]

On Fri, 7 Nov 2008 09:40:16 +0100 Ingo Molnar <mingo@xxxxxxx> wrote:

> +#if NR_CPUS == 1
> +/* Uniprocesor. */
> +#define cpumask_first(src)		({ (void)(src); 0; })
>
> ...
>
> +#else
> +static inline unsigned int cpumask_first(const struct cpumask *srcp)
> +{
> +	return find_first_bit(cpumask_bits(srcp), nr_cpumask_bits);
> +}
>
> ...
>
> +#endif /* SMP */

So I can happily compile and run

	cpumask_first("hello, world");

with CONFIG_SMP=n?

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