random: remove unused randomize_range() (7425154d) · Commits · 戴 / test

drivers/char/random.c

+0 −19

Original line number	Original line	Diff line number	Diff line
	@@ -2100,25 +2100,6 @@ unsigned long get_random_long(void)
	}		}
	EXPORT_SYMBOL(get_random_long);		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		* randomize_page - Generate a random, page aligned address
	* @start: The smallest acceptable address the caller will take.		* @start: The smallest acceptable address the caller will take.

+0 −1

Original line number	Original line	Diff line number	Diff line
	@@ -34,7 +34,6 @@ extern const struct file_operations random_fops, urandom_fops;

	unsigned int get_random_int(void);		unsigned int get_random_int(void);
	unsigned long get_random_long(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);		unsigned long randomize_page(unsigned long start, unsigned long range);

	u32 prandom_u32(void);		u32 prandom_u32(void);