Merge branch 'linus' into x86/cpu

1 files changed, 12 insertions, 7 deletions

diff --git a/drivers/char/random.c b/drivers/char/random.c
index f824ef8a927..8c7444857a4 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1665,15 +1665,20 @@ EXPORT_SYMBOL(secure_dccp_sequence_number);
  * value is not cryptographically secure but for several uses the cost of
  * depleting entropy is too high
  */
+DEFINE_PER_CPU(__u32 [4], get_random_int_hash);
 unsigned int get_random_int(void)
 {
-	/*
-	 * Use IP's RNG. It suits our purpose perfectly: it re-keys itself
-	 * every second, from the entropy pool (and thus creates a limited
-	 * drain on it), and uses halfMD4Transform within the second. We
-	 * also mix it with jiffies and the PID:
-	 */
-	return secure_ip_id((__force __be32)(current->pid + jiffies));
+	struct keydata *keyptr;
+	__u32 *hash = get_cpu_var(get_random_int_hash);
+	int ret;
+
+	keyptr = get_keyptr();
+	hash[0] += current->pid + jiffies + get_cycles();
+
+	ret = half_md4_transform(hash, keyptr->secret);
+	put_cpu_var(get_random_int_hash);
+
+	return ret;
 }
 
 /*