[PATCH] randomize_range: use random long instead of int

william.c.roberts
2016-07-25T18:27:34Z

From: William Roberts <william.c.roberts@intel.com>

Use a long when generating the random range rather than
an int. This will produce better random distributions as
well as matching all the types at hand.

Signed-off-by: William Roberts <william.c.roberts@intel.com>
---
drivers/char/random.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 0158d3b..bbf11b5 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1837,7 +1837,8 @@ randomize_range(unsigned long start, unsigned long end, unsigned long len)

if (end <= start + len)
return 0;
- return PAGE_ALIGN(get_random_int() % range + start);
+
+ return PAGE_ALIGN(get_random_long() % range + start);
}

/* Interface for in-kernel drivers of true hardware RNGs.
--
1.9.1