random: Add get_random_long fucntion

Signed-off-by: Joe Maples <joe@frap129.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 48aa67d80..29db712b1 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1745,6 +1745,28 @@ unsigned int get_random_int(void)
 EXPORT_SYMBOL(get_random_int);
 
 /*
+ * Same as get_random_int(), but returns unsigned long.
+ */
+unsigned long get_random_long(void)
+{
+	__u32 *hash;
+	unsigned long ret;
+
+	if (arch_get_random_long(&ret))
+		return ret;
+
+	hash = get_cpu_var(get_random_int_hash);
+
+	hash[0] += current->pid + jiffies + get_cycles();
+	md5_transform(hash, random_int_secret);
+	ret = *(unsigned long *)hash;
+	put_cpu_var(get_random_int_hash);
+
+	return ret;
+}
+EXPORT_SYMBOL(get_random_long);
+
+/*
  * randomize_range() returns a start address such that
  *
  *    [...... <range> .....]