kni: fix build with kernel < 3.0

Compile error:
  CC [M]  .../build/lib/librte_eal/linuxapp/kni/igb_main.o
.../build/lib/librte_eal/linuxapp/kni/igb_main.c:
In function ‘igb_check_swap_media’:
.../build/lib/librte_eal/linuxapp/kni/igb_main.c:1556:7:
error: variable ‘link’ set but not used [-Werror=unused-but-set-variable]
  bool link;
       ^

With Linux kernel >= v3.0 this warning disabled:
Linux: 8417da6f2128 ("kbuild: Fix passing -Wno-* options to gcc 4.4+")

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c b/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c
index 3dd103c..2b150f4 100644 (file)
--- a/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c
+++ b/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c
@@ -1558,6 +1558,7 @@ static void igb_check_swap_media(struct igb_adapter *adapter)
        ctrl_ext = E1000_READ_REG(hw, E1000_CTRL_EXT);
        connsw = E1000_READ_REG(hw, E1000_CONNSW);
        link = igb_has_link(adapter);
+       (void) link;
 
        /* need to live swap if current media is copper and we have fiber/serdes
         * to go to.