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| author | Ingo Molnar <mingo@kernel.org> | 2016-03-07 09:27:30 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-03-07 09:27:30 +0100 |
| commit | ec87e1cf7d8399d81d8965c6d852f8057a8dd687 (patch) | |
| tree | 472a168fa4861090edf110c8a9712a5c15ea259f /drivers/char/random.c | |
| parent | uprobes: __create_xol_area() must nullify xol_mapping.fault (diff) | |
| parent | Linux 4.5-rc7 (diff) | |
| download | linux-ec87e1cf7d8399d81d8965c6d852f8057a8dd687.tar.xz linux-ec87e1cf7d8399d81d8965c6d852f8057a8dd687.zip | |
Merge tag 'v4.5-rc7' into x86/asm, to pick up SMAP fix
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/char/random.c')
| -rw-r--r-- | drivers/char/random.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index d0da5d852d41..b583e5336630 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1819,6 +1819,28 @@ 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> .....] |