lwtunnel: Fix the sparse warnings in fib_encap_match
authorYing Xue <ying.xue@windriver.com>
Wed, 19 Aug 2015 07:46:17 +0000 (15:46 +0800)
committerDavid S. Miller <davem@davemloft.net>
Thu, 20 Aug 2015 00:37:51 +0000 (17:37 -0700)
commit824e7383e92815cb591793c74cc836aa5165f7f8
treea6b56b9a67b8124895f9261a047c99830533bcb9
parentdef63be85fe774477fb66043003e5b2ee748c4fa
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>
include/net/lwtunnel.h