Re: [PATCH] ipv4: ipconfig: avoid unused ic_proto_used symbol

[Sergei Shtylyov]

Hello.

On 1/27/2016 4:53 PM, Arnd Bergmann wrote:

> When CONFIG_PROC_FS, CONFIG_IP_PNP_BOOTP, CONFIG_IP_PNP_DHCP and
> CONFIG_IP_PNP_RARP are all disabled, we get a warning about the
> ic_proto_used variable being unused:
>
> net/ipv4/ipconfig.c:146:12: error: 'ic_proto_used' defined but not used [-Werror=unused-variable]
>
> This avoids the warning, but making the definition conditional on

   s/but/by/?

> whether a dynamic IP configuration protocol is configured. If not,
> we know that the value is always zero, so we can optimize away the
> variable and all code that depends on it.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
[...]

MBR, Sergei