# Re: \[PATCH v5 13/13\] vdpa: Use BIT\_ULL for bit operations

- From: Si-Wei Liu \<hidden\>
- Date: 2021-12-22 02:08:36 
- List: virtualization
- Page: https://ratatoskr.run/virtualization/2021/12/15818587
- Thread: https://ratatoskr.run/virtualization/2021/12/15818587/t.md

```text


On 12/21/2021 9:20 AM, Eli Cohen wrote:
> All masks in this file are 64 bits. Change BIT to BIT_ULL.
>
> Other occurences use (1 << val) which yields a 32 bit value. Change them
> to use BIT_ULL too.
>
> Signed-off-by: Eli Cohen <redacted>
Reviewed-by: Si-Wei Liu <redacted>
> ---
>   drivers/vdpa/vdpa.c | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
> index 4b649125a038..84ee11393349 100644
> --- a/drivers/vdpa/vdpa.c
> +++ b/drivers/vdpa/vdpa.c
> @@ -576,9 +576,9 @@ vdpa_nl_cmd_mgmtdev_get_dumpit(struct sk_buff *msg, struct netlink_callback *cb)
>   	return msg->len;
>   }
>   
> -#define VDPA_DEV_NET_ATTRS_MASK ((1 << VDPA_ATTR_DEV_NET_CFG_MACADDR) | \
> -				 (1 << VDPA_ATTR_DEV_NET_CFG_MTU) | \
> -				 (1 << VDPA_ATTR_DEV_NET_CFG_MAX_VQP))
> +#define VDPA_DEV_NET_ATTRS_MASK (BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MACADDR) | \
> +				 BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MTU)     | \
> +				 BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MAX_VQP))
>   
>   static int vdpa_nl_cmd_dev_add_set_doit(struct sk_buff *skb, struct genl_info *info)
>   {
> @@ -597,12 +597,12 @@ static int vdpa_nl_cmd_dev_add_set_doit(struct sk_buff *skb, struct genl_info *i
>   	if (nl_attrs[VDPA_ATTR_DEV_NET_CFG_MACADDR]) {
>   		macaddr = nla_data(nl_attrs[VDPA_ATTR_DEV_NET_CFG_MACADDR]);
>   		memcpy(config.net.mac, macaddr, sizeof(config.net.mac));
> -		config.mask |= (1 << VDPA_ATTR_DEV_NET_CFG_MACADDR);
> +		config.mask |= BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MACADDR);
>   	}
>   	if (nl_attrs[VDPA_ATTR_DEV_NET_CFG_MTU]) {
>   		config.net.mtu =
>   			nla_get_u16(nl_attrs[VDPA_ATTR_DEV_NET_CFG_MTU]);
> -		config.mask |= (1 << VDPA_ATTR_DEV_NET_CFG_MTU);
> +		config.mask |= BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MTU);
>   	}
>   	if (nl_attrs[VDPA_ATTR_DEV_NET_CFG_MAX_VQP]) {
>   		config.net.max_vq_pairs =
> @@ -814,7 +814,7 @@ static int vdpa_dev_net_mq_config_fill(struct vdpa_device *vdev,
>   {
>   	u16 val_u16;
>   
> -	if ((features & (1ULL << VIRTIO_NET_F_MQ)) == 0)
> +	if ((features & BIT_ULL(VIRTIO_NET_F_MQ)) == 0)
>   		return 0;
>   
>   	val_u16 = le16_to_cpu(config->max_virtqueue_pairs);

_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
```