summaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2012-11-29 12:51:17 -0500
committerDavid S. Miller <davem@davemloft.net>2012-11-29 12:51:17 -0500
commit8a2cf062b27ef5511a7d8a7ce6662fbc04f671b8 (patch)
tree31f32c0d9a548f0dbbe9f3a32aca5767093d98b4 /kernel
parent3177bf6f922f62743133abbcbbbb5545f4133b2d (diff)
parente9296e89b85604862bd9ec2d54dc43edad775c0d (diff)
downloadop-kernel-dev-8a2cf062b27ef5511a7d8a7ce6662fbc04f671b8.zip
op-kernel-dev-8a2cf062b27ef5511a7d8a7ce6662fbc04f671b8.tar.gz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/futex.c18
-rw-r--r--kernel/watchdog.c4
2 files changed, 19 insertions, 3 deletions
diff --git a/kernel/futex.c b/kernel/futex.c
index 20ef219..19eb089 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -843,6 +843,9 @@ static void wake_futex(struct futex_q *q)
{
struct task_struct *p = q->task;
+ if (WARN(q->pi_state || q->rt_waiter, "refusing to wake PI futex\n"))
+ return;
+
/*
* We set q->lock_ptr = NULL _before_ we wake up the task. If
* a non-futex wake up happens on another CPU then the task
@@ -1078,6 +1081,10 @@ retry_private:
plist_for_each_entry_safe(this, next, head, list) {
if (match_futex (&this->key, &key1)) {
+ if (this->pi_state || this->rt_waiter) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
wake_futex(this);
if (++ret >= nr_wake)
break;
@@ -1090,6 +1097,10 @@ retry_private:
op_ret = 0;
plist_for_each_entry_safe(this, next, head, list) {
if (match_futex (&this->key, &key2)) {
+ if (this->pi_state || this->rt_waiter) {
+ ret = -EINVAL;
+ goto out_unlock;
+ }
wake_futex(this);
if (++op_ret >= nr_wake2)
break;
@@ -1098,6 +1109,7 @@ retry_private:
ret += op_ret;
}
+out_unlock:
double_unlock_hb(hb1, hb2);
out_put_keys:
put_futex_key(&key2);
@@ -1387,9 +1399,13 @@ retry_private:
/*
* FUTEX_WAIT_REQEUE_PI and FUTEX_CMP_REQUEUE_PI should always
* be paired with each other and no other futex ops.
+ *
+ * We should never be requeueing a futex_q with a pi_state,
+ * which is awaiting a futex_unlock_pi().
*/
if ((requeue_pi && !this->rt_waiter) ||
- (!requeue_pi && this->rt_waiter)) {
+ (!requeue_pi && this->rt_waiter) ||
+ this->pi_state) {
ret = -EINVAL;
break;
}
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 9d4c8d5..dd4b80a 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -116,7 +116,7 @@ static unsigned long get_timestamp(int this_cpu)
return cpu_clock(this_cpu) >> 30LL; /* 2^30 ~= 10^9 */
}
-static unsigned long get_sample_period(void)
+static u64 get_sample_period(void)
{
/*
* convert watchdog_thresh from seconds to ns
@@ -125,7 +125,7 @@ static unsigned long get_sample_period(void)
* and hard thresholds) to increment before the
* hardlockup detector generates a warning
*/
- return get_softlockup_thresh() * (NSEC_PER_SEC / 5);
+ return get_softlockup_thresh() * ((u64)NSEC_PER_SEC / 5);
}
/* Commands for resetting the watchdog */
OpenPOWER on IntegriCloud