From: Ying Xue <ying.xue@windriver.com>
Date: Wed, 19 Aug 2015 07:46:17 +0000 (+0800)
Subject: lwtunnel: Fix the sparse warnings in fib_encap_match
X-Git-Tag: v4.3-rc1~96^2~131
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=824e7383e92815cb591793c74cc836aa5165f7f8;p=profile%2Fcommon%2Fplatform%2Fkernel%2Flinux-artik7.git

lwtunnel: Fix the sparse warnings in fib_encap_match

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/include/net/lwtunnel.h b/include/net/lwtunnel.h
index 34fd8f7..cfee539 100644
--- a/include/net/lwtunnel.h
+++ b/include/net/lwtunnel.h
@@ -93,6 +93,10 @@ int lwtunnel_input6(struct sk_buff *skb);
 
 #else
 
+static inline void lwtstate_free(struct lwtunnel_state *lws)
+{
+}
+
 static inline struct lwtunnel_state *
 lwtstate_get(struct lwtunnel_state *lws)
 {