[7/7] random: Remove unused randomize_range()

Commit Message

Jason Cooper July 28, 2016, 8:47 p.m. UTC

All call sites for randomize_range have been updated to use the much
simpler and more robust randomize_addr.  Remove the now unnecessary
code.

Signed-off-by: Jason Cooper <[e-mail]>
---
 drivers/char/random.c  | 19 -------------------
 include/linux/random.h |  1 -
 2 files changed, 20 deletions(-)

Patch

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 3610774bcc53..5333763a4820 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1821,25 +1821,6 @@  unsigned long get_random_long(void)
 }
 EXPORT_SYMBOL(get_random_long);
 
-/*
- * randomize_range() returns a start address such that
- *
- *    [...... <range> .....]
- *  start                  end
- *
- * a <range> with size "len" starting at the return value is inside in the
- * area defined by [start, end], but is otherwise randomized.
- */
-unsigned long
-randomize_range(unsigned long start, unsigned long end, unsigned long len)
-{
-	unsigned long range = end - len - start;
-
-	if (end <= start + len)
-		return 0;
-	return PAGE_ALIGN(get_random_int() % range + start);
-}
-
 /**
  * randomize_addr - Generate a random, page aligned address
  * @start:	The smallest acceptable address the caller will take.
diff --git a/include/linux/random.h b/include/linux/random.h
index f1ca2fa4c071..1ad877a98186 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -34,7 +34,6 @@  extern const struct file_operations random_fops, urandom_fops;
 
 unsigned int get_random_int(void);
 unsigned long get_random_long(void);
-unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
 unsigned long randomize_addr(unsigned long start, unsigned long range);
 
 u32 prandom_u32(void);