random: use for_each_online_node() to iterate over NUMA nodes

This fixes a crash on s390 with fake NUMA enabled.

Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Fixes: 1e7f583af67b ("random: make /dev/urandom scalable for silly userspace programs")
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 8d0af74f6569..7f0622426b97 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1668,13 +1668,12 @@ static int rand_initialize(void)
 #ifdef CONFIG_NUMA
         pool = kmalloc(num_nodes * sizeof(void *),
                        GFP_KERNEL|__GFP_NOFAIL|__GFP_ZERO);
-        for (i=0; i < num_nodes; i++) {
+        for_each_online_node(i) {
                 crng = kmalloc_node(sizeof(struct crng_state),
                                     GFP_KERNEL | __GFP_NOFAIL, i);
                 spin_lock_init(&crng->lock);
                 crng_initialize(crng);
                 pool[i] = crng;
-
         }
         mb();
         crng_node_pool = pool;