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authorDave Airlie <airlied@redhat.com>2016-03-14 09:42:34 +1000
committerDave Airlie <airlied@redhat.com>2016-03-14 09:46:02 +1000
commit9b61c0fcdf0cfd20a85d9856d46142e7f297de0a (patch)
treed4abe6aa3f4e1e088f9da1d0597e078b1fe58912 /drivers/char/random.c
parent550e3b23a53c88adfa46e64f9d442743e65d47da (diff)
parent125234dc8b1cc862f52d8bd5b37c36cc59b2cb86 (diff)
Merge drm-fixes into drm-next.
Nouveau wanted this to avoid some worse conflicts when I merge that.
Diffstat (limited to 'drivers/char/random.c')
-rw-r--r--drivers/char/random.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c
index d0da5d852d41..b583e5336630 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1819,6 +1819,28 @@ 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 + random_get_entropy();
+ 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> .....]