[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>

diff --git a/net/ipv4/tunnel4.c b/net/ipv4/tunnel4.c
index d619d2e83f5d69f62ff3daecad930c06a7d12731..978b3fd61e65533f3cf01f26521fc6f406288fac 100644 (file)
--- 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;