On 07/05/2018 04:03 PM, Tiwei Bie wrote:
On Thu, Jul 05, 2018 at 02:49:34PM +0200, Maxime Coquelin wrote:
On 07/05/2018 09:15 AM, Tiwei Bie wrote:
On Wed, Jul 04, 2018 at 11:54:32PM +0200, Maxime Coquelin wrote:
[...]
+
+static __rte_always_inline void
+flush_shadow_used_ring_packed(struct virtio_net *dev,
+                       struct vhost_virtqueue *vq)
+{
[...]
+}
+
+static __rte_always_inline void
+update_shadow_used_ring_packed(struct vhost_virtqueue *vq,
+                        uint16_t desc_idx, uint16_t len, uint16_t count)
+{
+       uint16_t i = vq->shadow_used_idx++;
+
+       vq->shadow_used_packed[i].id  = desc_idx;
+       vq->shadow_used_packed[i].len = len;
+       vq->shadow_used_packed[i].count = count;
   }

I met below build errors in this patch when doing
per-patch build test with clang:

lib/librte_vhost/virtio_net.c:134:1: error: unused function 
'flush_shadow_used_ring_packed'
        [-Werror,-Wunused-function]
flush_shadow_used_ring_packed(struct virtio_net *dev,
^
lib/librte_vhost/virtio_net.c:188:1: error: unused function 
'update_shadow_used_ring_packed'
        [-Werror,-Wunused-function]
update_shadow_used_ring_packed(struct vhost_virtqueue *vq,
^

It's better to add __rte_unused in this patch,
and remove it when functions are used.

PS. I also saw similar errors with fill_vec_buf_packed()
      in patch 11/15.


Thanks for the report, I missed these build issues...
This is not fixed using __rte_unused as you suggested.

Oops, I meant "This *now* fixed using __rte_unused" :)


Why not? This can be fixed by something like this
on my machine:

-static __rte_always_inline void
+static __rte_always_inline __rte_unused void
  flush_shadow_used_ring_packed(struct virtio_net *dev,
                        struct vhost_virtqueue *vq)
  {

And __rte_unused can be removed in the patch that
above function is called.

Best regards,
Tiwei Bie

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