Re: [PATCH v3 1/9] smp: Run functions concurrently in smp_call_function_many()

[Peter Zijlstra]

On Thu, Jul 18, 2019 at 05:58:29PM -0700, Nadav Amit wrote:
> +/*
> + * Call a function on all processors.  May be used during early boot while
> + * early_boot_irqs_disabled is set.
> + */
> +static inline void on_each_cpu(smp_call_func_t func, void *info, int wait)
> +{
> +	on_each_cpu_mask(cpu_online_mask, func, info, wait);
> +}

I'm thinking that one if buggy, nothing protects online mask here.