On Wed, 2018-06-20 at 15:56 -0400, Rik van Riel wrote:
> 
> +void tlb_flush_remove_tables(struct mm_struct *mm)
> +{
> +	int cpu = get_cpu();
> +	/*
> +	 * XXX: this really only needs to be called for CPUs in lazy
> TLB mode.
> +	 */
> +	if (cpumask_any_but(mm_cpumask(mm), cpu) < nr_cpu_ids)
> +		smp_call_function_many(mm_cpumask(mm),
> tlb_flush_remove_tables_local, (void *)mm, 1);
> +}
>  

Jens helpfully pointed out I missed a put_cpu().

I have added that in my tree for a v2 of the series.

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