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authorJason Cooper <jason@lakedaemon.net>2016-10-11 13:54:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-11 15:06:32 -0700
commit7425154d3bbf5fcc7554738cab6dfac559ffbdda (patch)
tree5860053d69fbdf15eee6de00859bcff22e6e76bf /drivers/char/random.c
parent05c2679e9562f7e9ca11dacc91cf21b6c42d532d (diff)
downloadleg-kernel-7425154d3bbf5fcc7554738cab6dfac559ffbdda.tar.gz
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 <jason@lakedaemon.net> Acked-by: Kees Cook <keescook@chromium.org> Cc: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/random.c')
-rw-r--r--drivers/char/random.c19
1 files changed, 0 insertions, 19 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
- *
- * [...... <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_page - Generate a random, page aligned address
* @start: The smallest acceptable address the caller will take.