[dpdk-dev] [PATCH v7 09/15] vhost: add shadow used ring support for packed rings

[Maxime Coquelin]

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.

Maxime