From 7425154d3bbf5fcc7554738cab6dfac559ffbdda Mon Sep 17 00:00:00 2001 From: Jason Cooper Date: Tue, 11 Oct 2016 13:54:11 -0700 Subject: [PATCH] random: remove unused randomize_range() All call sites for randomize_range have been updated to use the much simpler and more robust randomize_addr(). Remove the now unnecessary code. Link: http://lkml.kernel.org/r/20160803233913.32511-8-jason@lakedaemon.net Signed-off-by: Jason Cooper Acked-by: Kees Cook Cc: "Theodore Ts'o" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/random.c | 19 ------------------- include/linux/random.h | 1 - 2 files changed, 20 deletions(-) diff --git a/drivers/char/random.c b/drivers/char/random.c index 40eb07e79b02..d131e152c8ce 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -2100,25 +2100,6 @@ unsigned long get_random_long(void) } EXPORT_SYMBOL(get_random_long); -/* - * randomize_range() returns a start address such that - * - * [...... .....] - * start end - * - * a 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_page - 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 26741892828a..f7bb7a355cf7 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_page(unsigned long start, unsigned long range); u32 prandom_u32(void);