[PATCH net-next] net: dst: move cpu inside ifdef to avoid compilation warning

[Jakub Kicinski]

If CONFIG_DST_CACHE is not selected cpu variable
will be unused and we will see a compilation warning.
Move it under the ifdef.

Reported-by: kbuild test robot <fengguang...@intel.com>
Fixes: d66f2b91f95b ("bpf: don't rely on the verifier lock for metadata_dst 
allocation")
Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 net/core/dst.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dst.c b/net/core/dst.c
index 8b2eafac984d..662a2d4a3d19 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -325,9 +325,9 @@ EXPORT_SYMBOL_GPL(metadata_dst_alloc_percpu);
 
 void metadata_dst_free_percpu(struct metadata_dst __percpu *md_dst)
 {
+#ifdef CONFIG_DST_CACHE
        int cpu;
 
-#ifdef CONFIG_DST_CACHE
        for_each_possible_cpu(cpu) {
                struct metadata_dst *one_md_dst = per_cpu_ptr(md_dst, cpu);
 
-- 
2.14.1