linux-kernel - Re: [PATCH] virtio: drop a useless config read

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Message-ID: <20150331150201.34cb8823.cornelia.huck@de.ibm.com>
Date:	Tue, 31 Mar 2015 15:02:01 +0200
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH] virtio: drop a useless config read

On Tue, 31 Mar 2015 13:55:42 +0200
"Michael S. Tsirkin" <mst@...hat.com> wrote:

> commit d71de9ec6ba806104439d3a669befda84757b5af
>     "virtio: core support for config generation"
> fixed reading up 64 bit values, adding generation
> checks for such reads.
> 
> By mistake, it left an explicit get call in place
> as well. the result is that the value is read twice,
> the first result is discarded.
> 
> Not a big deal since this only happens with virtio
> blk and only on boot ATM, so performance isn't
> affected, but let's clean it up.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> ---
>  include/linux/virtio_config.h | 1 -
>  1 file changed, 1 deletion(-)

Reviewed-by: Cornelia Huck <cornelia.huck@...ibm.com>

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