netfilter: ipset: Prepare the ipset core to use RCU at set level

Replace rwlock_t with spinlock_t in "struct ip_set" and change the locking
accordingly. Convert the comment extension into an rcu-avare object. Also,
simplify the timeout routines.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>

1 files changed, 10 insertions, 15 deletions

diff --git a/include/linux/netfilter/ipset/ip_set_timeout.h b/include/linux/netfilter/ipset/ip_set_timeout.h
index 3c8842bcedaa..1d6a935c1ac5 100644
--- a/include/linux/netfilter/ipset/ip_set_timeout.h
+++ b/include/linux/netfilter/ipset/ip_set_timeout.h
@@ -40,31 +40,26 @@ ip_set_timeout_uget(struct nlattr *tb)
 }
 
 static inline bool
-ip_set_timeout_test(unsigned long timeout)
+ip_set_timeout_expired(unsigned long *t)
 {
-	return timeout == IPSET_ELEM_PERMANENT ||
-	       time_is_after_jiffies(timeout);
-}
-
-static inline bool
-ip_set_timeout_expired(unsigned long *timeout)
-{
-	return *timeout != IPSET_ELEM_PERMANENT &&
-	       time_is_before_jiffies(*timeout);
+	return *t != IPSET_ELEM_PERMANENT && time_is_before_jiffies(*t);
 }
 
 static inline void
-ip_set_timeout_set(unsigned long *timeout, u32 t)
+ip_set_timeout_set(unsigned long *timeout, u32 value)
 {
-	if (!t) {
+	unsigned long t;
+
+	if (!value) {
 		*timeout = IPSET_ELEM_PERMANENT;
 		return;
 	}
 
-	*timeout = msecs_to_jiffies(t * MSEC_PER_SEC) + jiffies;
-	if (*timeout == IPSET_ELEM_PERMANENT)
+	t = msecs_to_jiffies(value * MSEC_PER_SEC) + jiffies;
+	if (t == IPSET_ELEM_PERMANENT)
 		/* Bingo! :-) */
-		(*timeout)--;
+		t--;
+	*timeout = t;
 }
 
 static inline u32