[Patch net-next] net_sched: fix a compile warning in act_ife

[Cong Wang]

Apparently ife_meta_id2name() is only called when
CONFIG_MODULES is defined.

This fixes:

net/sched/act_ife.c:251:20: warning: ‘ife_meta_id2name’ defined but not used 
[-Wunused-function]
 static const char *ife_meta_id2name(u32 metaid)
                    ^~~~~~~~~~~~~~~~

Fixes: d3f24ba895f0 ("net sched actions: fix module auto-loading")
Cc: Roman Mashak <m...@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
---
 net/sched/act_ife.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sched/act_ife.c b/net/sched/act_ife.c
index 252ee7d8c731..3007cb1310ea 100644
--- a/net/sched/act_ife.c
+++ b/net/sched/act_ife.c
@@ -248,6 +248,7 @@ static int ife_validate_metatype(struct tcf_meta_ops *ops, 
void *val, int len)
        return ret;
 }
 
+#ifdef CONFIG_MODULES
 static const char *ife_meta_id2name(u32 metaid)
 {
        switch (metaid) {
@@ -261,6 +262,7 @@ static const char *ife_meta_id2name(u32 metaid)
                return "unknown";
        }
 }
+#endif
 
 /* called when adding new meta information
  * under ife->tcf_lock for existing action
-- 
2.13.0