[IPV6]: Optimize hop-limit determination.

Last part of hop-limit determination is always:
    hoplimit = dst_metric(dst, RTAX_HOPLIMIT);
    if (hoplimit < 0)
        hoplimit = ipv6_get_hoplimit(dst->dev).

Let's consolidate it as ip6_dst_hoplimit(dst).

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 11 insertions, 9 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index a4b5aee0f68a..aa3f08718e44 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1034,15 +1034,17 @@ static int ipv6_get_mtu(struct net_device *dev)
         return mtu;
 }
 
-int ipv6_get_hoplimit(struct net_device *dev)
-{
-        int hoplimit = ipv6_devconf.hop_limit;
-        struct inet6_dev *idev;
-
-        idev = in6_dev_get(dev);
-        if (idev) {
-                hoplimit = idev->cnf.hop_limit;
-                in6_dev_put(idev);
+int ip6_dst_hoplimit(struct dst_entry *dst)
+{
+        int hoplimit = dst_metric(dst, RTAX_HOPLIMIT);
+        if (hoplimit < 0) {
+                struct net_device *dev = dst->dev;
+                struct inet6_dev *idev = in6_dev_get(dev);
+                if (idev) {
+                        hoplimit = idev->cnf.hop_limit;
+                        in6_dev_put(idev);
+                } else
+                        hoplimit = ipv6_devconf.hop_limit;
         }
         return hoplimit;
 }