From: Jason Cooper Date: Tue, 11 Oct 2016 20:54:11 +0000 (-0700) Subject: random: remove unused randomize_range() X-Git-Tag: v4.9-rc1~42^2~37 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7425154d3bbf5fcc7554738cab6dfac559ffbdda;p=platform%2Fkernel%2Flinux-exynos.git 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 --- diff --git a/drivers/char/random.c b/drivers/char/random.c index 40eb07e..d131e15 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 2674189..f7bb7a3 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);