diff options
| -rw-r--r-- | drivers/char/random.c | 22 | ||||
| -rw-r--r-- | include/linux/random.h | 1 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 8a64dbeae7b..e20ef1ce6ae 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1658,6 +1658,28 @@ unsigned int get_random_int(void) EXPORT_SYMBOL(get_random_int); /* + * Same as get_random_int(), but returns unsigned long. + */ +unsigned long get_random_long(void) +{ + __u32 *hash; + unsigned long ret; + + if (arch_get_random_long(&ret)) + return ret; + + hash = get_cpu_var(get_random_int_hash); + + hash[0] += current->pid + jiffies + random_get_entropy(); + md5_transform(hash, random_int_secret); + ret = *(unsigned long *)hash; + put_cpu_var(get_random_int_hash); + + return ret; +} +EXPORT_SYMBOL(get_random_long); + +/* * randomize_range() returns a start address such that * * [...... <range> .....] diff --git a/include/linux/random.h b/include/linux/random.h index 1cfce0e24db..bfce7d17794 100644 --- a/include/linux/random.h +++ b/include/linux/random.h @@ -23,6 +23,7 @@ extern const struct file_operations random_fops, urandom_fops; #endif 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); u32 prandom_u32(void); |