linux-kernel - Re: [PATCH] virtio_ring: boolean values to a bool variable

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Date:   Mon, 18 Jan 2021 10:57:03 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Jiapeng Zhong <abaci-bugfix@...ux.alibaba.com>, mst@...hat.com
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] virtio_ring: boolean values to a bool variable


On 2021/1/15 下午6:00, Jiapeng Zhong wrote:
> Fix the following coccicheck warnings:
>
> ./drivers/virtio/virtio_ring.c:1637:1-29: WARNING: Assignment of
> 0/1 to bool variable.
>
> ./drivers/virtio/virtio_ring.c:1636:1-30: WARNING: Assignment of
> 0/1 to bool variable.
>
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Zhong <abaci-bugfix@...ux.alibaba.com>


It looks to me it's not the only places:

git grep avail_wrap_counter
drivers/virtio/virtio_ring.c:                   bool avail_wrap_counter;
drivers/virtio/virtio_ring.c: vq->packed.avail_wrap_counter ^= 1;
drivers/virtio/virtio_ring.c: vq->packed.avail_wrap_counter ^= 1;
drivers/virtio/virtio_ring.c:   if (wrap_counter != 
vq->packed.avail_wrap_counter)
drivers/virtio/virtio_ring.c:   vq->packed.avail_wrap_counter = 1;

Thanks


> ---
>   drivers/virtio/virtio_ring.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index 71e16b5..5adb361 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -1633,8 +1633,8 @@ static struct virtqueue *vring_create_virtqueue_packed(
>   	vq->packed.vring.device = device;
>   
>   	vq->packed.next_avail_idx = 0;
> -	vq->packed.avail_wrap_counter = 1;
> -	vq->packed.used_wrap_counter = 1;
> +	vq->packed.avail_wrap_counter = true;
> +	vq->packed.used_wrap_counter = true;
>   	vq->packed.event_flags_shadow = 0;
>   	vq->packed.avail_used_flags = 1 << VRING_PACKED_DESC_F_AVAIL;
>