netdev - Re: [PATCH] net_sched: fix unused variable warning in stmmac

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Message-Id: <20180822.214050.1461943848445235396.davem@davemloft.net>
Date:   Wed, 22 Aug 2018 21:40:50 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     arnd@...db.de
Cc:     jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        jakub.kicinski@...ronome.com, simon.horman@...ronome.com,
        nogahf@...lanox.com, aring@...atatu.com, john.hurley@...ronome.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net_sched: fix unused variable warning in stmmac

From: Arnd Bergmann <arnd@...db.de>
Date: Wed, 22 Aug 2018 17:25:44 +0200

> The new tcf_exts_for_each_action() macro doesn't reference its
> arguments when CONFIG_NET_CLS_ACT is disabled, which leads to
> a harmless warning in at least one driver:
> 
> drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c: In function 'tc_fill_actions':
> drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c:64:6: error: unused variable 'i' [-Werror=unused-variable]
> 
> Adding a cast to void lets us avoid this kind of warning.
> To be on the safe side, do it for all three arguments, not
> just the one that caused the warning.
> 
> Fixes: 244cd96adb5f ("net_sched: remove list_head from tc_action")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Applied, thanks Arnd.