Re: [PATCH RESEND net-next] lwtunnel: Fix the sparse warnings in fib_encap_match

[David Miller <davem@davemloft.net>]

From: Ying Xue <ying.xue@windriver.com>
Date: Wed, 19 Aug 2015 15:46:17 +0800

> When CONFIG_LWTUNNEL config is not enabled, the lwtstate_free() is not
> declared in lwtunnel.h at all. However, even in this case, the function
> is still referenced in fib_semantics.c so that there appears the
> following sparse warnings:
> 
> net/ipv4/fib_semantics.c:553:17: error: undefined identifier 'lwtstate_free'
>   CC      net/ipv4/fib_semantics.o
>   net/ipv4/fib_semantics.c: In function ‘fib_encap_match’:
>   net/ipv4/fib_semantics.c:553:3: error: implicit declaration of function ‘lwtstate_free’ [-Werror=implicit-function-declaration]
>   cc1: some warnings being treated as errors
>   make[1]: *** [net/ipv4/fib_semantics.o] Error 1
>   make: *** [net/ipv4/fib_semantics.o] Error 2
> 
> To eliminate the error, we define an empty function for lwtstate_free()
> in lwtunnel.h when CONFIG_LWTUNNEL is disabled.
> 
> Fixes: df383e6240ef ("lwtunnel: fix memory leak")
> Cc: Jiri Benc <jbenc@redhat.com>
> Reported-by: kbuild test robot <fengguang.wu@intel.com>
> Signed-off-by: Ying Xue <ying.xue@windriver.com>
> Acked-by: Jiri Benc <jbenc@redhat.com>

Applied, thanks.