net: simplify the getting percpu of flow_cache

replace per_cpu with per_cpu_ptr to save conversion between address and pointer

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/flow.c b/net/core/flow.c
index 7fae135..707fb7b 100644 (file)
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -334,7 +334,7 @@ static int flow_cache_percpu_empty(struct flow_cache *fc, int cpu)
        struct flow_cache_percpu *fcp;
        int i;
 
-       fcp = &per_cpu(*fc->percpu, cpu);
+       fcp = per_cpu_ptr(fc->percpu, cpu);
        for (i = 0; i < flow_cache_hash_size(fc); i++)
                if (!hlist_empty(&fcp->hash_table[i]))
                        return 0;