random: move randomize_page() into mm where it belongs

[platform/kernel/linux-rpi.git] / drivers / char / random.c

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 772f453..dfff00c 100644 (file)
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -624,38 +624,6 @@ int __cold random_prepare_cpu(unsigned int cpu)
 }
 #endif
 
-/**
- * randomize_page - Generate a random, page aligned address
- * @start:     The smallest acceptable address the caller will take.
- * @range:     The size of the area, starting at @start, within which the
- *             random address must fall.
- *
- * If @start + @range would overflow, @range is capped.
- *
- * NOTE: Historical use of randomize_range, which this replaces, presumed that
- * @start was already page aligned.  We now align it regardless.
- *
- * Return: A page aligned address within [start, start + range).  On error,
- * @start is returned.
- */
-unsigned long randomize_page(unsigned long start, unsigned long range)
-{
-       if (!PAGE_ALIGNED(start)) {
-               range -= PAGE_ALIGN(start) - start;
-               start = PAGE_ALIGN(start);
-       }
-
-       if (start > ULONG_MAX - range)
-               range = ULONG_MAX - start;
-
-       range >>= PAGE_SHIFT;
-
-       if (range == 0)
-               return start;
-
-       return start + (get_random_long() % range << PAGE_SHIFT);
-}
-
 /*
  * This function will use the architecture-specific hardware random
  * number generator if it is available. It is not recommended for