Re: [PATCH 10/10] virtio/s390: make airq summary indicators DMA

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On Fri, 26 Apr 2019 20:32:45 +0200
Halil Pasic <pasic@xxxxxxxxxxxxx> wrote:

> Hypervisor needs to interact with the summary indicators, so these
> need to be DMA memory as well (at least for protected virtualization
> guests).
> 
> Signed-off-by: Halil Pasic <pasic@xxxxxxxxxxxxx>
> ---
>  drivers/s390/virtio/virtio_ccw.c | 24 +++++++++++++++++-------
>  1 file changed, 17 insertions(+), 7 deletions(-)

(...)

> @@ -237,7 +243,8 @@ static void virtio_airq_handler(struct airq_struct *airq)
>  	read_unlock(&info->lock);
>  }
>  
> -static struct airq_info *new_airq_info(void)
> +/* call with airq_areas_lock held */

Hm, where is airq_areas_lock defined? If it was introduced in one of
the previous patches, I have missed it.

> +static struct airq_info *new_airq_info(int index)
>  {
>  	struct airq_info *info;
>  	int rc;



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