[INET]: Cleanup the xfrm4_tunnel_(un)register

Both check for the family to select an appropriate tunnel list.
Consolidate this check and make the for() loop more readable.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 4 deletions

diff --git a/net/ipv4/tunnel4.c b/net/ipv4/tunnel4.c
index d619d2e83f5d..978b3fd61e65 100644
--- a/net/ipv4/tunnel4.c
+++ b/net/ipv4/tunnel4.c
@@ -17,6 +17,11 @@ static struct xfrm_tunnel *tunnel4_handlers;
 static struct xfrm_tunnel *tunnel64_handlers;
 static DEFINE_MUTEX(tunnel4_mutex);
 
+static inline struct xfrm_tunnel **fam_handlers(unsigned short family)
+{
+        return (family == AF_INET) ? &tunnel4_handlers : &tunnel64_handlers;
+}
+
 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family)
 {
         struct xfrm_tunnel **pprev;
@@ -25,8 +30,7 @@ int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family)
 
         mutex_lock(&tunnel4_mutex);
 
-        for (pprev = (family == AF_INET) ? &tunnel4_handlers : &tunnel64_handlers;
-             *pprev; pprev = &(*pprev)->next) {
+        for (pprev = fam_handlers(family); *pprev; pprev = &(*pprev)->next) {
                 if ((*pprev)->priority > priority)
                         break;
                 if ((*pprev)->priority == priority)
@@ -53,8 +57,7 @@ int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family)
 
         mutex_lock(&tunnel4_mutex);
 
-        for (pprev = (family == AF_INET) ? &tunnel4_handlers : &tunnel64_handlers;
-             *pprev; pprev = &(*pprev)->next) {
+        for (pprev = fam_handlers(family); *pprev; pprev = &(*pprev)->next) {
                 if (*pprev == handler) {
                         *pprev = handler->next;
                         ret = 0;