Re: [PATCH v2 2/3] net: macb: Remove CONFIG_OF around DT match table

[Rob Herring]

On Tue, Apr 11, 2017 at 11:41 PM, Florian Fainelli <f.fainelli@xxxxxxxxx> wrote:
> A subsequent patch is going to make of_match_node() an inline stub when
> CONFIG_OF is disabled, which will let the compiler eliminate unused variables.
> In order not to clutter the code more, remove the CONFIG_OF #ifdef such that
> macb_dt_ids and what it references are always defined.
>
> Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
> ---
>  drivers/net/ethernet/cadence/macb.c | 2 --
>  1 file changed, 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
> index 30606b11b128..01016e9525ee 100644
> --- a/drivers/net/ethernet/cadence/macb.c
> +++ b/drivers/net/ethernet/cadence/macb.c
> @@ -2811,7 +2811,6 @@ static int macb_init(struct platform_device *pdev)
>         return 0;
>  }
>
> -#if defined(CONFIG_OF)
>  /* 1518 rounded up */
>  #define AT91ETHER_MAX_RBUFF_SZ 0x600
>  /* max number of receive buffers */
> @@ -3215,7 +3214,6 @@ static const struct of_device_id macb_dt_ids[] = {
>         { /* sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, macb_dt_ids);

Did you actually check that the compiler can eliminate things when
modules are enabled? Because it's not going to be able to eliminate
MODULE_DEVICE_TABLE entry AFAICT.

Rob