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author | Ingo Molnar <mingo@elte.hu> | 2009-05-18 07:37:44 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-05-18 07:37:49 +0200 |
commit | dc3f81b129b5439ba7bac265bbc6a51a39275dae (patch) | |
tree | 216030731d911249496d2e97206cd61431e31c89 /drivers/char | |
parent | d2517a49d55536b38c7a87e5289550cfedaa4dcc (diff) | |
parent | 1406de8e11eb043681297adf86d6892ff8efc27a (diff) | |
download | linux-dc3f81b129b5439ba7bac265bbc6a51a39275dae.tar.gz linux-dc3f81b129b5439ba7bac265bbc6a51a39275dae.tar.bz2 linux-dc3f81b129b5439ba7bac265bbc6a51a39275dae.zip |
Merge commit 'v2.6.30-rc6' into perfcounters/core
Merge reason: this branch was on an -rc4 base, merge it up to -rc6
to get the latest upstream fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/char')
-rw-r--r-- | drivers/char/random.c | 19 | ||||
-rw-r--r-- | drivers/char/sysrq.c | 4 | ||||
-rw-r--r-- | drivers/char/vt_ioctl.c | 6 |
3 files changed, 20 insertions, 9 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index f824ef8a9273..b2ced39d76b2 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; } /* diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c index aed2b2936ecf..39a05b5fa9cb 100644 --- a/drivers/char/sysrq.c +++ b/drivers/char/sysrq.c @@ -408,7 +408,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = { &sysrq_showlocks_op, /* d */ &sysrq_term_op, /* e */ &sysrq_moom_op, /* f */ - /* g: May be registered by ppc for kgdb */ + /* g: May be registered for the kernel debugger */ NULL, /* g */ NULL, /* h - reserved for help */ &sysrq_kill_op, /* i */ @@ -433,7 +433,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = { &sysrq_sync_op, /* s */ &sysrq_showstate_op, /* t */ &sysrq_mountro_op, /* u */ - /* v: May be registered at init time by SMP VOYAGER */ + /* v: May be registered for frame buffer console restore */ NULL, /* v */ &sysrq_showstate_blocked_op, /* w */ /* x: May be registered on ppc/powerpc for xmon */ diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c index a2dee0eb6dad..e6ce632a393e 100644 --- a/drivers/char/vt_ioctl.c +++ b/drivers/char/vt_ioctl.c @@ -400,6 +400,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, case KIOCSOUND: if (!perm) goto eperm; + /* FIXME: This is an old broken API but we need to keep it + supported and somehow separate the historic advertised + tick rate from any real one */ if (arg) arg = CLOCK_TICK_RATE / arg; kd_mksound(arg, 0); @@ -417,6 +420,9 @@ int vt_ioctl(struct tty_struct *tty, struct file * file, */ ticks = HZ * ((arg >> 16) & 0xffff) / 1000; count = ticks ? (arg & 0xffff) : 0; + /* FIXME: This is an old broken API but we need to keep it + supported and somehow separate the historic advertised + tick rate from any real one */ if (count) count = CLOCK_TICK_RATE / count; kd_mksound(count, ticks); |