[PATCH] random: don't sleep during allocations in irq context

[Sebastian Ott]

Since numa_crng_init() can be called from irq context let's
use __GFP_ATOMIC for allocations.

Fixes: 8ef35c866f88 ("random: set up the NUMA crng instances...")
Signed-off-by: Sebastian Ott <sebott@xxxxxxxxxxxxx>
---
 drivers/char/random.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 3cd3aae24d6d..e96ea2bf7241 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -791,14 +791,14 @@ static void crng_initialize(struct crng_state *crng)
 #ifdef CONFIG_NUMA
 static void numa_crng_init(void)
 {
+	gfp_t gfp_flags = GFP_KERNEL | __GFP_NOFAIL | __GFP_ATOMIC;
 	int i;
 	struct crng_state *crng;
 	struct crng_state **pool;
 
-	pool = kcalloc(nr_node_ids, sizeof(*pool), GFP_KERNEL|__GFP_NOFAIL);
+	pool = kcalloc(nr_node_ids, sizeof(*pool), gfp_flags);
 	for_each_online_node(i) {
-		crng = kmalloc_node(sizeof(struct crng_state),
-				    GFP_KERNEL | __GFP_NOFAIL, i);
+		crng = kmalloc_node(sizeof(struct crng_state), gfp_flags, i);
 		spin_lock_init(&crng->lock);
 		crng_initialize(crng);
 		pool[i] = crng;
-- 
2.13.4