Re: [net-next v3] idpf: Don't hard code napi_struct size

[Alexander Lobakin]

From: Joe Damato <jdamato@xxxxxxxxxx>
Date: Fri,  4 Oct 2024 10:54:07 +0000

> The sizeof(struct napi_struct) can change. Don't hardcode the size to
> 400 bytes and instead use "sizeof(struct napi_struct)".
> 
> Suggested-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx>
> Signed-off-by: Joe Damato <jdamato@xxxxxxxxxx>

Acked-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx>

I'm sorry that I complicated things a bit with those assertions =\

> ---
>  drivers/net/ethernet/intel/idpf/idpf_txrx.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.h b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
> index f0537826f840..9c1fe84108ed 100644
> --- a/drivers/net/ethernet/intel/idpf/idpf_txrx.h
> +++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
> @@ -438,7 +438,8 @@ struct idpf_q_vector {
>  	__cacheline_group_end_aligned(cold);
>  };
>  libeth_cacheline_set_assert(struct idpf_q_vector, 112,
> -			    424 + 2 * sizeof(struct dim),
> +			    24 + sizeof(struct napi_struct) +
> +			    2 * sizeof(struct dim),
>  			    8 + sizeof(cpumask_var_t));
>  
>  struct idpf_rx_queue_stats {

Thanks,
Olek