[PATCH v1 52/73] net/ntnic: update alignment for virt queue structs

[Stephen Hemminger]

On Mon, 21 Oct 2024 23:04:54 +0200
Serhii Iliushyk <sil-plv at napatech.com> wrote:

> truct __rte_aligned(8) virtq_avail {
> +struct __rte_packed __rte_aligned(1) virtq_avail {
>  	uint16_t flags;
>  	uint16_t idx;
>  	uint16_t ring[];	/* Queue Size */
>  };
>  
> -struct __rte_aligned(8) virtq_used_elem {
> +struct __rte_packed __rte_aligned(1) virtq_used_elem {
>  	/* Index of start of used descriptor chain. */
>  	uint32_t id;
>  	/* Total length of the descriptor chain which was used (written to) */
>  	uint32_t len;
>  };
>  
> -struct __rte_aligned(8) virtq_used {
> +struct __rte_packed __rte_aligned(1) virtq_used {
>  	uint16_t flags;
>  	uint16_t idx;
>  	struct virtq_used_elem ring[];	/* Queue Size */

If you use __rte_packed doesn't it assume no alignment.