linux-kernel - Re: [PATCH] net: dsa/slave: Fix compilation warnings

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Date:	Tue, 30 Oct 2012 12:15:49 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	davem@...emloft.net, linaro-dev@...ts.linaro.org,
	patches@...aro.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: dsa/slave: Fix compilation warnings

On 30 October 2012 01:29, Ben Hutchings <bhutchings@...arflare.com> wrote:
> On Mon, 2012-10-29 at 22:27 +0530, Viresh Kumar wrote:
>> Currently when none of CONFIG_NET_DSA_TAG_DSA, CONFIG_NET_DSA_TAG_EDSA and
>> CONFIG_NET_DSA_TAG_TRAILER is defined, we get following compilation warnings:
>>
>> net/dsa/slave.c:51:12: warning: 'dsa_slave_init' defined but not used [-Wunused-function]
>> net/dsa/slave.c:60:12: warning: 'dsa_slave_open' defined but not used [-Wunused-function]
>> net/dsa/slave.c:98:12: warning: 'dsa_slave_close' defined but not used [-Wunused-function]
>> net/dsa/slave.c:116:13: warning: 'dsa_slave_change_rx_flags' defined but not used [-Wunused-function]
>> net/dsa/slave.c:127:13: warning: 'dsa_slave_set_rx_mode' defined but not used [-Wunused-function]
>> net/dsa/slave.c:136:12: warning: 'dsa_slave_set_mac_address' defined but not used [-Wunused-function]
>> net/dsa/slave.c:164:12: warning: 'dsa_slave_ioctl' defined but not used [-Wunused-function]
>>
>> Fix them by enclosing these routines under #ifdef,endif.
> [...]
>
> This is not a useful configuration.  It might make more sense to make
> NET_DSA a hidden option and have the DSA drivers (in drivers/net/dsa)
> select it rather than depending on it.

I don't have any idea about net/dsa/***. I just wanted to fix this
awkward looking warning :)
What i understood from your comment is: Atleast one of the tagging
formats must be
always enabled if we want to use net/dsa/ stuff ??

And so the functions i have enclosed under ifdefs will always be used
if net/dsa/ is
used.

And so, if we select NET_DSA from these tagging drivers, then only slave.c will
get compiled. Otherwise slave.c dsa.c dsa_core.c wouldn't be compiled and so
no warnings.

Correct??

--
viresh
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