Re: [PATCH] vhost: silence an unused-variable warning

[David Miller]

From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Wed,  6 Mar 2019 12:05:49 +0100

> On some architectures, the MMU can be disabled, leading to access_ok()
> becoming an empty macro that does not evaluate its size argument,
> which in turn produces an unused-variable warning:
> 
> drivers/vhost/vhost.c:1191:9: error: unused variable 's' [-Werror,-Wunused-variable]
>         size_t s = vhost_has_feature(vq, VIRTIO_RING_F_EVENT_IDX) ? 2 : 0;
> 
> Mark the variable as __maybe_unused to shut up that warning.
> 
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

I'll apply this, thanks Arnd.