netdev - Re: [PATCH] net: i40e: avoid unused function warnings

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Date:	Wed, 20 Jan 2016 14:17:25 -0800
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	Arnd Bergmann <arnd@...db.de>, netdev@...r.kernel.org
Cc:	davem@...emloft.net, Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Shannon Nelson <shannon.nelson@...el.com>,
	Carolyn Wyborny <carolyn.wyborny@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	Mitch Williams <mitch.a.williams@...el.com>,
	intel-wired-lan@...ts.osuosl.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] net: i40e: avoid unused function warnings

On Wed, 2016-01-20 at 11:42 +0100, Arnd Bergmann wrote:
> The addition of the geneve tunnel offload code left a couple
> of functions unconditionally defined but empty whenever CONFIG_VXLAN
> and CONFIG_GENEVE are disabled. gcc warns about this:
> 
> i40e_main.c:7049:13: warning: 'i40e_sync_udp_filters_subtask' defined
> but not used [-Wunused-function]
> i40e_main.c:8516:13: warning: 'i40e_add_vxlan_port' defined but not
> used [-Wunused-function]
> i40e_main.c:8561:13: warning: 'i40e_del_vxlan_port' defined but not
> used [-Wunused-function]
> i40e_main.c:8596:13: warning: 'i40e_add_geneve_port' defined but not
> used [-Wunused-function]
> i40e_main.c:8643:13: warning: 'i40e_del_geneve_port' defined but not
> used [-Wunused-function]
> 
> This moves the #ifdef statements to the outside of the affected
> functions, which avoids the warnings.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 6a899024058d ("i40e: geneve tunnel offload support")
> ---
> This is a harmless regression against v4.4, found on ARM randconfig
> builds

Thanks Arnd, I already have a patch from Eric Dumazet and Alex Duyck to
resolve this issue.

Dave- I plan on pushing the fix later today to net.
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