Merge branch 'topic/pcm-jiffies-check' into for-linus

[pandora-kernel.git] / drivers / char / random.c

diff --git a/drivers/char/random.c b/drivers/char/random.c
index f824ef8..8c74448 100644 (file)
--- 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;
 }
 
 /*