xfrm_policy: kill flow to policy dir conversion

XFRM_POLICY_IN/OUT/FWD are identical to FLOW_DIR_*, so gcc already
removed this function as its just returns the argument.  Again, no
code change.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 19d457db3a0989e07bb471315fbaf149a3d2b65c..9f724a6884758be91b8c57e9d36448c6070f33ce 100644 (file)
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1187,24 +1187,6 @@ __xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir
        return xfrm_policy_lookup_bytype(net, XFRM_POLICY_TYPE_MAIN, fl, family, dir);
 }
 
-static int flow_to_policy_dir(int dir)
-{
-       if (XFRM_POLICY_IN == FLOW_DIR_IN &&
-           XFRM_POLICY_OUT == FLOW_DIR_OUT &&
-           XFRM_POLICY_FWD == FLOW_DIR_FWD)
-               return dir;
-
-       switch (dir) {
-       default:
-       case FLOW_DIR_IN:
-               return XFRM_POLICY_IN;
-       case FLOW_DIR_OUT:
-               return XFRM_POLICY_OUT;
-       case FLOW_DIR_FWD:
-               return XFRM_POLICY_FWD;
-       }
-}
-
 static struct flow_cache_object *
 xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family,
                   u8 dir, struct flow_cache_object *old_obj, void *ctx)
@@ -1214,7 +1196,7 @@ xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family,
        if (old_obj)
                xfrm_pol_put(container_of(old_obj, struct xfrm_policy, flo));
 
-       pol = __xfrm_policy_lookup(net, fl, family, flow_to_policy_dir(dir));
+       pol = __xfrm_policy_lookup(net, fl, family, dir);
        if (IS_ERR_OR_NULL(pol))
                return ERR_CAST(pol);
 
@@ -1225,23 +1207,6 @@ xfrm_policy_lookup(struct net *net, const struct flowi *fl, u16 family,
        return &pol->flo;
 }
 
-static inline int policy_to_flow_dir(int dir)
-{
-       if (XFRM_POLICY_IN == FLOW_DIR_IN &&
-           XFRM_POLICY_OUT == FLOW_DIR_OUT &&
-           XFRM_POLICY_FWD == FLOW_DIR_FWD)
-               return dir;
-       switch (dir) {
-       default:
-       case XFRM_POLICY_IN:
-               return FLOW_DIR_IN;
-       case XFRM_POLICY_OUT:
-               return FLOW_DIR_OUT;
-       case XFRM_POLICY_FWD:
-               return FLOW_DIR_FWD;
-       }
-}
-
 static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir,
                                                 const struct flowi *fl, u16 family)
 {
@@ -1261,7 +1226,7 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir,
                        }
                        err = security_xfrm_policy_lookup(pol->security,
                                                      fl->flowi_secid,
-                                                     policy_to_flow_dir(dir));
+                                                     dir);
                        if (!err) {
                                if (!xfrm_pol_hold_rcu(pol))
                                        goto again;
@@ -2063,8 +2028,7 @@ xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
        /* Resolve policies to use if we couldn't get them from
         * previous cache entry */
        num_pols = 1;
-       pols[0] = __xfrm_policy_lookup(net, fl, family,
-                                      flow_to_policy_dir(dir));
+       pols[0] = __xfrm_policy_lookup(net, fl, family, dir);
        err = xfrm_expand_policies(fl, family, pols,
                                           &num_pols, &num_xfrms);
        if (err < 0)
@@ -2142,7 +2106,7 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
        struct xfrm_dst *xdst;
        struct dst_entry *dst, *route;
        u16 family = dst_orig->ops->family;
-       u8 dir = policy_to_flow_dir(XFRM_POLICY_OUT);
+       u8 dir = XFRM_POLICY_OUT;
        int i, err, num_pols, num_xfrms = 0, drop_pols = 0;
 
        dst = NULL;
@@ -2399,12 +2363,10 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
        int pi;
        int reverse;
        struct flowi fl;
-       u8 fl_dir;
        int xerr_idx = -1;
 
        reverse = dir & ~XFRM_POLICY_MASK;
        dir &= XFRM_POLICY_MASK;
-       fl_dir = policy_to_flow_dir(dir);
 
        if (__xfrm_decode_session(skb, &fl, family, reverse) < 0) {
                XFRM_INC_STATS(net, LINUX_MIB_XFRMINHDRERROR);