diff mbox

[dpdk-dev,4/4] vhost: define callfd and kickfd as int type

Message ID 1440388485-13554-4-git-send-email-yuanhan.liu@linux.intel.com (mailing list archive)
State Superseded, archived
Headers

Commit Message

Yuanhan Liu Aug. 24, 2015, 3:54 a.m. UTC 
  So that we can remove the redundant (int) cast.

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
---
 examples/vhost/main.c                         |  6 ++---
 lib/librte_vhost/rte_virtio_net.h             |  4 ++--
 lib/librte_vhost/vhost_rxtx.c                 |  6 ++---
 lib/librte_vhost/vhost_user/virtio-net-user.c | 16 +++++++-------
 lib/librte_vhost/virtio-net.c                 | 32 +++++++++++++--------------
 5 files changed, 32 insertions(+), 32 deletions(-)

Comments

Ouyang Changchun Sept. 9, 2015, 1:43 a.m. UTC | #1 
> -----Original Message-----
> From: Yuanhan Liu [mailto:yuanhan.liu@linux.intel.com]
> Sent: Monday, August 24, 2015 11:55 AM
> To: dev@dpdk.org
> Cc: Xie, Huawei; Ouyang, Changchun; Yuanhan Liu
> Subject: [PATCH 4/4] vhost: define callfd and kickfd as int type
> 
> So that we can remove the redundant (int) cast.
> 
> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> ---

> diff --git a/lib/librte_vhost/rte_virtio_net.h
> b/lib/librte_vhost/rte_virtio_net.h
> index b9bf320..a037c15 100644
> --- a/lib/librte_vhost/rte_virtio_net.h
> +++ b/lib/librte_vhost/rte_virtio_net.h
> @@ -87,8 +87,8 @@ struct vhost_virtqueue {
>  	uint16_t		vhost_hlen;		/**< Vhost header
> length (varies depending on RX merge buffers. */
>  	volatile uint16_t	last_used_idx;		/**< Last index used
> on the available ring */
>  	volatile uint16_t	last_used_idx_res;	/**< Used for
> multiple devices reserving buffers. */
> -	eventfd_t		callfd;			/**< Used to notify
> the guest (trigger interrupt). */
> -	eventfd_t		kickfd;			/**< Currently
> unused as polling mode is enabled. */
> +	int			callfd;			/**< Used to notify
> the guest (trigger interrupt). */
> +	int			kickfd;			/**< Currently
> unused as polling mode is enabled. */

I don't think we have to change it from 8B(eventfd_t is defined as uint64_t) to 4B,
Any benefit for this change?
Yuanhan Liu Sept. 9, 2015, 1:54 a.m. UTC | #2 
On Wed, Sep 09, 2015 at 01:43:06AM +0000, Ouyang, Changchun wrote:
> 
> 
> > -----Original Message-----
> > From: Yuanhan Liu [mailto:yuanhan.liu@linux.intel.com]
> > Sent: Monday, August 24, 2015 11:55 AM
> > To: dev@dpdk.org
> > Cc: Xie, Huawei; Ouyang, Changchun; Yuanhan Liu
> > Subject: [PATCH 4/4] vhost: define callfd and kickfd as int type
> > 
> > So that we can remove the redundant (int) cast.
> > 
> > Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> > ---
> 
> > diff --git a/lib/librte_vhost/rte_virtio_net.h
> > b/lib/librte_vhost/rte_virtio_net.h
> > index b9bf320..a037c15 100644
> > --- a/lib/librte_vhost/rte_virtio_net.h
> > +++ b/lib/librte_vhost/rte_virtio_net.h
> > @@ -87,8 +87,8 @@ struct vhost_virtqueue {
> >  	uint16_t		vhost_hlen;		/**< Vhost header
> > length (varies depending on RX merge buffers. */
> >  	volatile uint16_t	last_used_idx;		/**< Last index used
> > on the available ring */
> >  	volatile uint16_t	last_used_idx_res;	/**< Used for
> > multiple devices reserving buffers. */
> > -	eventfd_t		callfd;			/**< Used to notify
> > the guest (trigger interrupt). */
> > -	eventfd_t		kickfd;			/**< Currently
> > unused as polling mode is enabled. */
> > +	int			callfd;			/**< Used to notify
> > the guest (trigger interrupt). */
> > +	int			kickfd;			/**< Currently
> > unused as polling mode is enabled. */
> 
> I don't think we have to change it from 8B(eventfd_t is defined as uint64_t) to 4B,
> Any benefit for this change? 

As I stated in the commit log, to remove the redundant (int) cast. Casts
like following are a bit ugly:

        if ((int)dev->virtqueue[VIRTIO_RXQ]->callfd >= 0)
                close((int)dev->virtqueue[VIRTIO_RXQ]->callfd);

On the other hand, why it has to be uint64_t? The caller side sends the
message(be more precisely, qemu) actually uses int type.

	--yliu
Ouyang Changchun Sept. 9, 2015, 2:37 a.m. UTC | #3 
> -----Original Message-----
> From: Yuanhan Liu [mailto:yuanhan.liu@linux.intel.com]
> Sent: Wednesday, September 9, 2015 9:55 AM
> To: Ouyang, Changchun
> Cc: dev@dpdk.org; Xie, Huawei
> Subject: Re: [PATCH 4/4] vhost: define callfd and kickfd as int type
> 
> On Wed, Sep 09, 2015 at 01:43:06AM +0000, Ouyang, Changchun wrote:
> >
> >
> > > -----Original Message-----
> > > From: Yuanhan Liu [mailto:yuanhan.liu@linux.intel.com]
> > > Sent: Monday, August 24, 2015 11:55 AM
> > > To: dev@dpdk.org
> > > Cc: Xie, Huawei; Ouyang, Changchun; Yuanhan Liu
> > > Subject: [PATCH 4/4] vhost: define callfd and kickfd as int type
> > >
> > > So that we can remove the redundant (int) cast.
> > >
> > > Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> > > ---
> >
> > > diff --git a/lib/librte_vhost/rte_virtio_net.h
> > > b/lib/librte_vhost/rte_virtio_net.h
> > > index b9bf320..a037c15 100644
> > > --- a/lib/librte_vhost/rte_virtio_net.h
> > > +++ b/lib/librte_vhost/rte_virtio_net.h
> > > @@ -87,8 +87,8 @@ struct vhost_virtqueue {
> > >  	uint16_t		vhost_hlen;		/**< Vhost header
> > > length (varies depending on RX merge buffers. */
> > >  	volatile uint16_t	last_used_idx;		/**< Last index used
> > > on the available ring */
> > >  	volatile uint16_t	last_used_idx_res;	/**< Used for
> > > multiple devices reserving buffers. */
> > > -	eventfd_t		callfd;			/**< Used to notify
> > > the guest (trigger interrupt). */
> > > -	eventfd_t		kickfd;			/**< Currently
> > > unused as polling mode is enabled. */
> > > +	int			callfd;			/**< Used to notify
> > > the guest (trigger interrupt). */
> > > +	int			kickfd;			/**< Currently
> > > unused as polling mode is enabled. */
> >
> > I don't think we have to change it from 8B(eventfd_t is defined as
> > uint64_t) to 4B, Any benefit for this change?
> 
> As I stated in the commit log, to remove the redundant (int) cast. Casts like
> following are a bit ugly:
> 
>         if ((int)dev->virtqueue[VIRTIO_RXQ]->callfd >= 0)
>                 close((int)dev->virtqueue[VIRTIO_RXQ]->callfd);
> 
> On the other hand, why it has to be uint64_t? The caller side sends the
> message(be more precisely, qemu) actually uses int type.
> 

Agree, qemu use 32 bit for the callfd and kickfd.
It could use int.
Well, there is another comment in other place in this patch, I will send out soon.


> 	--yliu
Ouyang Changchun Sept. 9, 2015, 2:41 a.m. UTC | #4 
> -----Original Message-----
> From: Yuanhan Liu [mailto:yuanhan.liu@linux.intel.com]
> Sent: Monday, August 24, 2015 11:55 AM
> To: dev@dpdk.org
> Cc: Xie, Huawei; Ouyang, Changchun; Yuanhan Liu
> Subject: [PATCH 4/4] vhost: define callfd and kickfd as int type
> 
> So that we can remove the redundant (int) cast.
> 
> Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> ---
>  examples/vhost/main.c                         |  6 ++---
>  lib/librte_vhost/rte_virtio_net.h             |  4 ++--
>  lib/librte_vhost/vhost_rxtx.c                 |  6 ++---
>  lib/librte_vhost/vhost_user/virtio-net-user.c | 16 +++++++-------
>  lib/librte_vhost/virtio-net.c                 | 32 +++++++++++++--------------
>  5 files changed, 32 insertions(+), 32 deletions(-)
> 
> diff --git a/examples/vhost/main.c b/examples/vhost/main.c index
> 1b137b9..b090b25 100644
> --- a/examples/vhost/main.c
> +++ b/examples/vhost/main.c
> @@ -1433,7 +1433,7 @@ put_desc_to_used_list_zcp(struct vhost_virtqueue
> *vq, uint16_t desc_idx)
> 
>  	/* Kick the guest if necessary. */
>  	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
> -		eventfd_write((int)vq->callfd, 1);
> +		eventfd_write(vq->callfd, 1);

Don't we need type conversion for '1' to eventfd_t here?

>  }
> 
>  /*
> @@ -1626,7 +1626,7 @@ txmbuf_clean_zcp(struct virtio_net *dev, struct
> vpool *vpool)
> 
>  	/* Kick guest if required. */
>  	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
> -		eventfd_write((int)vq->callfd, 1);
> +		eventfd_write(vq->callfd, 1);

Same as above

> 
>  	return 0;
>  }
> @@ -1774,7 +1774,7 @@ virtio_dev_rx_zcp(struct virtio_net *dev, struct
> rte_mbuf **pkts,
> 
>  	/* Kick the guest if necessary. */
>  	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
> -		eventfd_write((int)vq->callfd, 1);
> +		eventfd_write(vq->callfd, 1);

Same as above

> 
>  	return count;
>  }
> diff --git a/lib/librte_vhost/rte_virtio_net.h
> b/lib/librte_vhost/rte_virtio_net.h
> index b9bf320..a037c15 100644
> --- a/lib/librte_vhost/rte_virtio_net.h
> +++ b/lib/librte_vhost/rte_virtio_net.h
> @@ -87,8 +87,8 @@ struct vhost_virtqueue {
>  	uint16_t		vhost_hlen;		/**< Vhost header
> length (varies depending on RX merge buffers. */
>  	volatile uint16_t	last_used_idx;		/**< Last index used
> on the available ring */
>  	volatile uint16_t	last_used_idx_res;	/**< Used for
> multiple devices reserving buffers. */
> -	eventfd_t		callfd;			/**< Used to notify
> the guest (trigger interrupt). */
> -	eventfd_t		kickfd;			/**< Currently
> unused as polling mode is enabled. */
> +	int			callfd;			/**< Used to notify
> the guest (trigger interrupt). */
> +	int			kickfd;			/**< Currently
> unused as polling mode is enabled. */
>  	struct buf_vector	buf_vec[BUF_VECTOR_MAX];	/**< for
> scatter RX. */
>  } __rte_cache_aligned;
> 
> diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
> index d412293..887cdb6 100644
> --- a/lib/librte_vhost/vhost_rxtx.c
> +++ b/lib/librte_vhost/vhost_rxtx.c
> @@ -230,7 +230,7 @@ virtio_dev_rx(struct virtio_net *dev, uint16_t
> queue_id,
> 
>  	/* Kick the guest if necessary. */
>  	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
> -		eventfd_write((int)vq->callfd, 1);
> +		eventfd_write(vq->callfd, 1);
>  	return count;
>  }
> 
> @@ -529,7 +529,7 @@ virtio_dev_merge_rx(struct virtio_net *dev, uint16_t
> queue_id,
> 
>  		/* Kick the guest if necessary. */
>  		if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
> -			eventfd_write((int)vq->callfd, 1);
> +			eventfd_write(vq->callfd, 1);
>  	}
> 
>  	return count;
> @@ -752,6 +752,6 @@ rte_vhost_dequeue_burst(struct virtio_net *dev,
> uint16_t queue_id,
>  	vq->used->idx += entry_success;
>  	/* Kick guest if required. */
>  	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
> -		eventfd_write((int)vq->callfd, 1);
> +		eventfd_write(vq->callfd, 1);
>  	return entry_success;
>  }
> diff --git a/lib/librte_vhost/vhost_user/virtio-net-user.c
> b/lib/librte_vhost/vhost_user/virtio-net-user.c
> index c1ffc38..4689927 100644
> --- a/lib/librte_vhost/vhost_user/virtio-net-user.c
> +++ b/lib/librte_vhost/vhost_user/virtio-net-user.c
> @@ -214,10 +214,10 @@ virtio_is_ready(struct virtio_net *dev)
>  	rvq = dev->virtqueue[VIRTIO_RXQ];
>  	tvq = dev->virtqueue[VIRTIO_TXQ];
>  	if (rvq && tvq && rvq->desc && tvq->desc &&
> -		(rvq->kickfd != (eventfd_t)-1) &&
> -		(rvq->callfd != (eventfd_t)-1) &&
> -		(tvq->kickfd != (eventfd_t)-1) &&
> -		(tvq->callfd != (eventfd_t)-1)) {
> +		(rvq->kickfd != -1) &&
> +		(rvq->callfd != -1) &&
> +		(tvq->kickfd != -1) &&
> +		(tvq->callfd != -1)) {
>  		RTE_LOG(INFO, VHOST_CONFIG,
>  			"virtio is now ready for processing.\n");
>  		return 1;
> @@ -290,13 +290,13 @@ user_get_vring_base(struct vhost_device_ctx ctx,
>  	 * sent and only sent in vhost_vring_stop.
>  	 * TODO: cleanup the vring, it isn't usable since here.
>  	 */
> -	if (((int)dev->virtqueue[VIRTIO_RXQ]->kickfd) >= 0) {
> +	if ((dev->virtqueue[VIRTIO_RXQ]->kickfd) >= 0) {
>  		close(dev->virtqueue[VIRTIO_RXQ]->kickfd);
> -		dev->virtqueue[VIRTIO_RXQ]->kickfd = (eventfd_t)-1;
> +		dev->virtqueue[VIRTIO_RXQ]->kickfd = -1;
>  	}
> -	if (((int)dev->virtqueue[VIRTIO_TXQ]->kickfd) >= 0) {
> +	if ((dev->virtqueue[VIRTIO_TXQ]->kickfd) >= 0) {
>  		close(dev->virtqueue[VIRTIO_TXQ]->kickfd);
> -		dev->virtqueue[VIRTIO_TXQ]->kickfd = (eventfd_t)-1;
> +		dev->virtqueue[VIRTIO_TXQ]->kickfd = -1;
>  	}
> 
>  	return 0;
> diff --git a/lib/librte_vhost/virtio-net.c b/lib/librte_vhost/virtio-net.c index
> b670992..d0f1764 100644
> --- a/lib/librte_vhost/virtio-net.c
> +++ b/lib/librte_vhost/virtio-net.c
> @@ -190,14 +190,14 @@ cleanup_device(struct virtio_net *dev)
>  	}
> 
>  	/* Close any event notifiers opened by device. */
> -	if ((int)dev->virtqueue[VIRTIO_RXQ]->callfd >= 0)
> -		close((int)dev->virtqueue[VIRTIO_RXQ]->callfd);
> -	if ((int)dev->virtqueue[VIRTIO_RXQ]->kickfd >= 0)
> -		close((int)dev->virtqueue[VIRTIO_RXQ]->kickfd);
> -	if ((int)dev->virtqueue[VIRTIO_TXQ]->callfd >= 0)
> -		close((int)dev->virtqueue[VIRTIO_TXQ]->callfd);
> -	if ((int)dev->virtqueue[VIRTIO_TXQ]->kickfd >= 0)
> -		close((int)dev->virtqueue[VIRTIO_TXQ]->kickfd);
> +	if (dev->virtqueue[VIRTIO_RXQ]->callfd >= 0)
> +		close(dev->virtqueue[VIRTIO_RXQ]->callfd);
> +	if (dev->virtqueue[VIRTIO_RXQ]->kickfd >= 0)
> +		close(dev->virtqueue[VIRTIO_RXQ]->kickfd);
> +	if (dev->virtqueue[VIRTIO_TXQ]->callfd >= 0)
> +		close(dev->virtqueue[VIRTIO_TXQ]->callfd);
> +	if (dev->virtqueue[VIRTIO_TXQ]->kickfd >= 0)
> +		close(dev->virtqueue[VIRTIO_TXQ]->kickfd);
>  }
> 
>  /*
> @@ -261,10 +261,10 @@ init_device(struct virtio_net *dev)
>  	memset(dev->virtqueue[VIRTIO_RXQ], 0, sizeof(struct
> vhost_virtqueue));
>  	memset(dev->virtqueue[VIRTIO_TXQ], 0, sizeof(struct
> vhost_virtqueue));
> 
> -	dev->virtqueue[VIRTIO_RXQ]->kickfd = (eventfd_t)-1;
> -	dev->virtqueue[VIRTIO_RXQ]->callfd = (eventfd_t)-1;
> -	dev->virtqueue[VIRTIO_TXQ]->kickfd = (eventfd_t)-1;
> -	dev->virtqueue[VIRTIO_TXQ]->callfd = (eventfd_t)-1;
> +	dev->virtqueue[VIRTIO_RXQ]->kickfd = -1;
> +	dev->virtqueue[VIRTIO_RXQ]->callfd = -1;
> +	dev->virtqueue[VIRTIO_TXQ]->kickfd = -1;
> +	dev->virtqueue[VIRTIO_TXQ]->callfd = -1;
> 
>  	/* Backends are set to -1 indicating an inactive device. */
>  	dev->virtqueue[VIRTIO_RXQ]->backend = VIRTIO_DEV_STOPPED;
> @@ -685,8 +685,8 @@ set_vring_call(struct vhost_device_ctx ctx, struct
> vhost_vring_file *file)
>  	/* file->index refers to the queue index. The txq is 1, rxq is 0. */
>  	vq = dev->virtqueue[file->index];
> 
> -	if ((int)vq->callfd >= 0)
> -		close((int)vq->callfd);
> +	if (vq->callfd >= 0)
> +		close(vq->callfd);
> 
>  	vq->callfd = file->fd;
> 
> @@ -711,8 +711,8 @@ set_vring_kick(struct vhost_device_ctx ctx, struct
> vhost_vring_file *file)
>  	/* file->index refers to the queue index. The txq is 1, rxq is 0. */
>  	vq = dev->virtqueue[file->index];
> 
> -	if ((int)vq->kickfd >= 0)
> -		close((int)vq->kickfd);
> +	if (vq->kickfd >= 0)
> +		close(vq->kickfd);
> 
>  	vq->kickfd = file->fd;
> 
> --
> 1.9.0
Yuanhan Liu Sept. 9, 2015, 2:52 a.m. UTC | #5 
On Wed, Sep 09, 2015 at 02:41:37AM +0000, Ouyang, Changchun wrote:
> 
> 
> > -----Original Message-----
> > From: Yuanhan Liu [mailto:yuanhan.liu@linux.intel.com]
> > Sent: Monday, August 24, 2015 11:55 AM
> > To: dev@dpdk.org
> > Cc: Xie, Huawei; Ouyang, Changchun; Yuanhan Liu
> > Subject: [PATCH 4/4] vhost: define callfd and kickfd as int type
> > 
> > So that we can remove the redundant (int) cast.
> > 
> > Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> > ---
> >  examples/vhost/main.c                         |  6 ++---
> >  lib/librte_vhost/rte_virtio_net.h             |  4 ++--
> >  lib/librte_vhost/vhost_rxtx.c                 |  6 ++---
> >  lib/librte_vhost/vhost_user/virtio-net-user.c | 16 +++++++-------
> >  lib/librte_vhost/virtio-net.c                 | 32 +++++++++++++--------------
> >  5 files changed, 32 insertions(+), 32 deletions(-)
> > 
> > diff --git a/examples/vhost/main.c b/examples/vhost/main.c index
> > 1b137b9..b090b25 100644
> > --- a/examples/vhost/main.c
> > +++ b/examples/vhost/main.c
> > @@ -1433,7 +1433,7 @@ put_desc_to_used_list_zcp(struct vhost_virtqueue
> > *vq, uint16_t desc_idx)
> > 
> >  	/* Kick the guest if necessary. */
> >  	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
> > -		eventfd_write((int)vq->callfd, 1);
> > +		eventfd_write(vq->callfd, 1);
> 
> Don't we need type conversion for '1' to eventfd_t here?

Nope. See eventfd_write man page:

   int eventfd_read(int fd, eventfd_t *value);
   int eventfd_write(int fd, eventfd_t value);

	--yliu
diff mbox

Patch

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 1b137b9..b090b25 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -1433,7 +1433,7 @@  put_desc_to_used_list_zcp(struct vhost_virtqueue *vq, uint16_t desc_idx)
 
 	/* Kick the guest if necessary. */
 	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
-		eventfd_write((int)vq->callfd, 1);
+		eventfd_write(vq->callfd, 1);
 }
 
 /*
@@ -1626,7 +1626,7 @@  txmbuf_clean_zcp(struct virtio_net *dev, struct vpool *vpool)
 
 	/* Kick guest if required. */
 	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
-		eventfd_write((int)vq->callfd, 1);
+		eventfd_write(vq->callfd, 1);
 
 	return 0;
 }
@@ -1774,7 +1774,7 @@  virtio_dev_rx_zcp(struct virtio_net *dev, struct rte_mbuf **pkts,
 
 	/* Kick the guest if necessary. */
 	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
-		eventfd_write((int)vq->callfd, 1);
+		eventfd_write(vq->callfd, 1);
 
 	return count;
 }
diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h
index b9bf320..a037c15 100644
--- a/lib/librte_vhost/rte_virtio_net.h
+++ b/lib/librte_vhost/rte_virtio_net.h
@@ -87,8 +87,8 @@  struct vhost_virtqueue {
 	uint16_t		vhost_hlen;		/**< Vhost header length (varies depending on RX merge buffers. */
 	volatile uint16_t	last_used_idx;		/**< Last index used on the available ring */
 	volatile uint16_t	last_used_idx_res;	/**< Used for multiple devices reserving buffers. */
-	eventfd_t		callfd;			/**< Used to notify the guest (trigger interrupt). */
-	eventfd_t		kickfd;			/**< Currently unused as polling mode is enabled. */
+	int			callfd;			/**< Used to notify the guest (trigger interrupt). */
+	int			kickfd;			/**< Currently unused as polling mode is enabled. */
 	struct buf_vector	buf_vec[BUF_VECTOR_MAX];	/**< for scatter RX. */
 } __rte_cache_aligned;
 
diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index d412293..887cdb6 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -230,7 +230,7 @@  virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id,
 
 	/* Kick the guest if necessary. */
 	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
-		eventfd_write((int)vq->callfd, 1);
+		eventfd_write(vq->callfd, 1);
 	return count;
 }
 
@@ -529,7 +529,7 @@  virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id,
 
 		/* Kick the guest if necessary. */
 		if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
-			eventfd_write((int)vq->callfd, 1);
+			eventfd_write(vq->callfd, 1);
 	}
 
 	return count;
@@ -752,6 +752,6 @@  rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id,
 	vq->used->idx += entry_success;
 	/* Kick guest if required. */
 	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
-		eventfd_write((int)vq->callfd, 1);
+		eventfd_write(vq->callfd, 1);
 	return entry_success;
 }
diff --git a/lib/librte_vhost/vhost_user/virtio-net-user.c b/lib/librte_vhost/vhost_user/virtio-net-user.c
index c1ffc38..4689927 100644
--- a/lib/librte_vhost/vhost_user/virtio-net-user.c
+++ b/lib/librte_vhost/vhost_user/virtio-net-user.c
@@ -214,10 +214,10 @@  virtio_is_ready(struct virtio_net *dev)
 	rvq = dev->virtqueue[VIRTIO_RXQ];
 	tvq = dev->virtqueue[VIRTIO_TXQ];
 	if (rvq && tvq && rvq->desc && tvq->desc &&
-		(rvq->kickfd != (eventfd_t)-1) &&
-		(rvq->callfd != (eventfd_t)-1) &&
-		(tvq->kickfd != (eventfd_t)-1) &&
-		(tvq->callfd != (eventfd_t)-1)) {
+		(rvq->kickfd != -1) &&
+		(rvq->callfd != -1) &&
+		(tvq->kickfd != -1) &&
+		(tvq->callfd != -1)) {
 		RTE_LOG(INFO, VHOST_CONFIG,
 			"virtio is now ready for processing.\n");
 		return 1;
@@ -290,13 +290,13 @@  user_get_vring_base(struct vhost_device_ctx ctx,
 	 * sent and only sent in vhost_vring_stop.
 	 * TODO: cleanup the vring, it isn't usable since here.
 	 */
-	if (((int)dev->virtqueue[VIRTIO_RXQ]->kickfd) >= 0) {
+	if ((dev->virtqueue[VIRTIO_RXQ]->kickfd) >= 0) {
 		close(dev->virtqueue[VIRTIO_RXQ]->kickfd);
-		dev->virtqueue[VIRTIO_RXQ]->kickfd = (eventfd_t)-1;
+		dev->virtqueue[VIRTIO_RXQ]->kickfd = -1;
 	}
-	if (((int)dev->virtqueue[VIRTIO_TXQ]->kickfd) >= 0) {
+	if ((dev->virtqueue[VIRTIO_TXQ]->kickfd) >= 0) {
 		close(dev->virtqueue[VIRTIO_TXQ]->kickfd);
-		dev->virtqueue[VIRTIO_TXQ]->kickfd = (eventfd_t)-1;
+		dev->virtqueue[VIRTIO_TXQ]->kickfd = -1;
 	}
 
 	return 0;
diff --git a/lib/librte_vhost/virtio-net.c b/lib/librte_vhost/virtio-net.c
index b670992..d0f1764 100644
--- a/lib/librte_vhost/virtio-net.c
+++ b/lib/librte_vhost/virtio-net.c
@@ -190,14 +190,14 @@  cleanup_device(struct virtio_net *dev)
 	}
 
 	/* Close any event notifiers opened by device. */
-	if ((int)dev->virtqueue[VIRTIO_RXQ]->callfd >= 0)
-		close((int)dev->virtqueue[VIRTIO_RXQ]->callfd);
-	if ((int)dev->virtqueue[VIRTIO_RXQ]->kickfd >= 0)
-		close((int)dev->virtqueue[VIRTIO_RXQ]->kickfd);
-	if ((int)dev->virtqueue[VIRTIO_TXQ]->callfd >= 0)
-		close((int)dev->virtqueue[VIRTIO_TXQ]->callfd);
-	if ((int)dev->virtqueue[VIRTIO_TXQ]->kickfd >= 0)
-		close((int)dev->virtqueue[VIRTIO_TXQ]->kickfd);
+	if (dev->virtqueue[VIRTIO_RXQ]->callfd >= 0)
+		close(dev->virtqueue[VIRTIO_RXQ]->callfd);
+	if (dev->virtqueue[VIRTIO_RXQ]->kickfd >= 0)
+		close(dev->virtqueue[VIRTIO_RXQ]->kickfd);
+	if (dev->virtqueue[VIRTIO_TXQ]->callfd >= 0)
+		close(dev->virtqueue[VIRTIO_TXQ]->callfd);
+	if (dev->virtqueue[VIRTIO_TXQ]->kickfd >= 0)
+		close(dev->virtqueue[VIRTIO_TXQ]->kickfd);
 }
 
 /*
@@ -261,10 +261,10 @@  init_device(struct virtio_net *dev)
 	memset(dev->virtqueue[VIRTIO_RXQ], 0, sizeof(struct vhost_virtqueue));
 	memset(dev->virtqueue[VIRTIO_TXQ], 0, sizeof(struct vhost_virtqueue));
 
-	dev->virtqueue[VIRTIO_RXQ]->kickfd = (eventfd_t)-1;
-	dev->virtqueue[VIRTIO_RXQ]->callfd = (eventfd_t)-1;
-	dev->virtqueue[VIRTIO_TXQ]->kickfd = (eventfd_t)-1;
-	dev->virtqueue[VIRTIO_TXQ]->callfd = (eventfd_t)-1;
+	dev->virtqueue[VIRTIO_RXQ]->kickfd = -1;
+	dev->virtqueue[VIRTIO_RXQ]->callfd = -1;
+	dev->virtqueue[VIRTIO_TXQ]->kickfd = -1;
+	dev->virtqueue[VIRTIO_TXQ]->callfd = -1;
 
 	/* Backends are set to -1 indicating an inactive device. */
 	dev->virtqueue[VIRTIO_RXQ]->backend = VIRTIO_DEV_STOPPED;
@@ -685,8 +685,8 @@  set_vring_call(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
 	/* file->index refers to the queue index. The txq is 1, rxq is 0. */
 	vq = dev->virtqueue[file->index];
 
-	if ((int)vq->callfd >= 0)
-		close((int)vq->callfd);
+	if (vq->callfd >= 0)
+		close(vq->callfd);
 
 	vq->callfd = file->fd;
 
@@ -711,8 +711,8 @@  set_vring_kick(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
 	/* file->index refers to the queue index. The txq is 1, rxq is 0. */
 	vq = dev->virtqueue[file->index];
 
-	if ((int)vq->kickfd >= 0)
-		close((int)vq->kickfd);
+	if (vq->kickfd >= 0)
+		close(vq->kickfd);
 
 	vq->kickfd = file->fd;