Re: [PATCH] blk-mq: Use proper cpumask iterator

[Jens Axboe]

On 03/19/2016 04:30 AM, Thomas Gleixner wrote:
> queue_for_each_ctx() iterates over per_cpu variables under the assumption that
> the possible cpu mask cannot have holes. That's wrong as all cpumasks can have
> holes. In case there are holes the iteration ends up accessing uninitialized
> memory and crashing as a result.
>
> Replace the macro by a proper for_each_possible_cpu() loop and drop the unused
> macro blk_ctx_sum() which references queue_for_each_ctx().

Thanks Thomas, applied.

--
Jens Axboe