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author | Ingo Molnar <mingo@elte.hu> | 2009-05-18 08:15:09 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-05-18 08:15:35 (GMT) |
commit | 1079cac0f4eb7d968395378b1625979d4c818dd6 (patch) | |
tree | d261058d95d27fe7250511d5fad69db30dc17731 /drivers/char/random.c | |
parent | 5872144f64b34a5942f6b4acedc90b02de72c58b (diff) | |
parent | 1406de8e11eb043681297adf86d6892ff8efc27a (diff) | |
download | linux-fsl-qoriq-1079cac0f4eb7d968395378b1625979d4c818dd6.tar.xz |
Merge commit 'v2.6.30-rc6' into tracing/core
Merge reason: we were on an -rc4 base, sync up to -rc6
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/char/random.c')
-rw-r--r-- | drivers/char/random.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index f824ef8..b2ced39 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1665,15 +1665,20 @@ EXPORT_SYMBOL(secure_dccp_sequence_number); * value is not cryptographically secure but for several uses the cost of * depleting entropy is too high */ +DEFINE_PER_CPU(__u32 [4], get_random_int_hash); unsigned int get_random_int(void) { - /* - * Use IP's RNG. It suits our purpose perfectly: it re-keys itself - * every second, from the entropy pool (and thus creates a limited - * drain on it), and uses halfMD4Transform within the second. We - * also mix it with jiffies and the PID: - */ - return secure_ip_id((__force __be32)(current->pid + jiffies)); + struct keydata *keyptr; + __u32 *hash = get_cpu_var(get_random_int_hash); + int ret; + + keyptr = get_keyptr(); + hash[0] += current->pid + jiffies + get_cycles() + (int)(long)&ret; + + ret = half_md4_transform(hash, keyptr->secret); + put_cpu_var(get_random_int_hash); + + return ret; } /* |