Commit 824e7383 authored by Ying Xue's avatar Ying Xue Committed by David S. Miller

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: df383e62 ("lwtunnel: fix memory leak")
Cc: Jiri Benc <>
Reported-by: default avatarkbuild test robot <>
Signed-off-by: default avatarYing Xue <>
Acked-by: default avatarJiri Benc <>
Signed-off-by: default avatarDavid S. Miller <>
parent def63be8
......@@ -93,6 +93,10 @@ int lwtunnel_input6(struct sk_buff *skb);
static inline void lwtstate_free(struct lwtunnel_state *lws)
static inline struct lwtunnel_state *
lwtstate_get(struct lwtunnel_state *lws)
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