net/netfilter: rename random32() to prandom_u32()

Use preferable function name which implies using a pseudo-random
number generator.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

net/netfilter/nf_conntrack_core.c

@@ -264,7 +264,7 @@ static void death_by_event(unsigned long ul_conntrack)
 	if (nf_conntrack_event(IPCT_DESTROY, ct) < 0) {
 		/* bad luck, let's retry again */
 		ecache->timeout.expires = jiffies +
-			(random32() % net->ct.sysctl_events_retry_timeout);
+			(prandom_u32() % net->ct.sysctl_events_retry_timeout);
 		add_timer(&ecache->timeout);
 		return;
 	}
@@ -283,7 +283,7 @@ void nf_ct_dying_timeout(struct nf_conn *ct)
 	/* set a new timer to retry event delivery */
 	setup_timer(&ecache->timeout, death_by_event, (unsigned long)ct);
 	ecache->timeout.expires = jiffies +
-		(random32() % net->ct.sysctl_events_retry_timeout);
+		(prandom_u32() % net->ct.sysctl_events_retry_timeout);
 	add_timer(&ecache->timeout);
 }
 EXPORT_SYMBOL_GPL(nf_ct_dying_timeout);