Re: [PATCH V2] net: ethernet: mscc: fix missing brace warning for old compilers

[Jakub Kicinski]

On Tue,  3 Nov 2020 10:55:19 +0800 Pujin Shi wrote:
> For older versions of gcc, the array = {0}; will cause warnings:

Please include the version of gcc which generates this warning here.

> drivers/net/ethernet/mscc/ocelot_vcap.c: In function 'is1_entry_set':
> drivers/net/ethernet/mscc/ocelot_vcap.c:755:11: warning: missing braces around initializer [-Wmissing-braces]
>     struct ocelot_vcap_u16 etype = {0};
>            ^
> drivers/net/ethernet/mscc/ocelot_vcap.c:755:11: warning: (near initialization for 'etype.value') [-Wmissing-braces]
> 
> 1 warnings generated
> 
> Fixes: 75944fda1dfe ("net: mscc: ocelot: offload ingress skbedit and vlan actions to VCAP IS1")
> Signed-off-by: Pujin Shi <shipujin.t@xxxxxxxxx>
> ---
>  drivers/net/ethernet/mscc/ocelot_vcap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mscc/ocelot_vcap.c b/drivers/net/ethernet/mscc/ocelot_vcap.c
> index d8c778ee6f1b..b5167570521c 100644
> --- a/drivers/net/ethernet/mscc/ocelot_vcap.c
> +++ b/drivers/net/ethernet/mscc/ocelot_vcap.c
> @@ -752,7 +752,7 @@ static void is1_entry_set(struct ocelot *ocelot, int ix,
>  					     dport);
>  		} else {
>  			/* IPv4 "other" frame */
> -			struct ocelot_vcap_u16 etype = {0};
> +			struct ocelot_vcap_u16 etype = {{0}};

I believe Vladimir asked to use a memset instead;

			struct ocelot_vcap_u16 etype;

			memset(&etype, 0, sizeof(etype));
>  			/* Overloaded field */
>  			etype.value[0] = proto.value[0];