kernel/: 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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/rcutree.c

@@ -1319,7 +1319,7 @@ static int rcu_gp_init(struct rcu_state *rsp)
 					    rnp->grphi, rnp->qsmask);
 		raw_spin_unlock_irq(&rnp->lock);
 #ifdef CONFIG_PROVE_RCU_DELAY
-		if ((random32() % (rcu_num_nodes * 8)) == 0)
+		if ((prandom_u32() % (rcu_num_nodes * 8)) == 0)
 			schedule_timeout_uninterruptible(2);
 #endif /* #ifdef CONFIG_PROVE_RCU_DELAY */
 		cond_resched();

kernel/test_kprobes.c

@@ -365,7 +365,7 @@ int init_test_probes(void)
 	target2 = kprobe_target2;
 
 	do {
-		rand1 = random32();
+		rand1 = prandom_u32();
 	} while (rand1 <= div_factor);
 
 	printk(KERN_INFO "Kprobe smoke test started\n");