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>

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);