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Subject[ANNOUNCE] v5.0.21-rt15
Dear RT folks!

I'm pleased to announce the v5.0.21-rt15 patch set.

Changes since v5.0.21-rt14:

- Revert the replacement patch for wait_for_completion() and use the
old patch again. The alternative version caused a regression as
reported by Arve Barsnes, Corey Minyard, Kurt Kanzenbach and Steven
Rostedt.

Known issues
- rcutorture is currently broken on -RT. Reported by Juri Lelli.

The delta patch against v5.0.21-rt14 is appended below and can be found here:

https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.0/incr/patch-5.0.21-rt14-rt15.patch.xz

You can get this release via the git tree at:

git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v5.0.21-rt15

The RT patch against v5.0.21 can be found here:

https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.0/older/patch-5.0.21-rt15.patch.xz

The split quilt queue is available at:

https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.0/older/patches-5.0.21-rt15.tar.xz

Sebastian

diff --git a/include/linux/swait.h b/include/linux/swait.h
index 2ac63a13d26d3..21ae66cd41d30 100644
--- a/include/linux/swait.h
+++ b/include/linux/swait.h
@@ -61,13 +61,11 @@ struct swait_queue_head {
struct swait_queue {
struct task_struct *task;
struct list_head task_list;
- unsigned int remove;
};

#define __SWAITQUEUE_INITIALIZER(name) { \
.task = current, \
.task_list = LIST_HEAD_INIT((name).task_list), \
- .remove = 1, \
}

#define DECLARE_SWAITQUEUE(name) \
diff --git a/kernel/sched/completion.c b/kernel/sched/completion.c
index 755a580849781..49c14137988ea 100644
--- a/kernel/sched/completion.c
+++ b/kernel/sched/completion.c
@@ -72,12 +72,12 @@ do_wait_for_common(struct completion *x,
if (!x->done) {
DECLARE_SWAITQUEUE(wait);

- __prepare_to_swait(&x->wait, &wait);
do {
if (signal_pending_state(state, current)) {
timeout = -ERESTARTSYS;
break;
}
+ __prepare_to_swait(&x->wait, &wait);
__set_current_state(state);
raw_spin_unlock_irq(&x->wait.lock);
timeout = action(timeout);
diff --git a/kernel/sched/swait.c b/kernel/sched/swait.c
index e2c3d2691edf1..c58068d2ee06c 100644
--- a/kernel/sched/swait.c
+++ b/kernel/sched/swait.c
@@ -28,8 +28,7 @@ void swake_up_locked(struct swait_queue_head *q)

curr = list_first_entry(&q->task_list, typeof(*curr), task_list);
wake_up_process(curr->task);
- if (curr->remove)
- list_del_init(&curr->task_list);
+ list_del_init(&curr->task_list);
}
EXPORT_SYMBOL(swake_up_locked);

@@ -78,8 +77,7 @@ void swake_up_all(struct swait_queue_head *q)
curr = list_first_entry(&tmp, typeof(*curr), task_list);

wake_up_state(curr->task, TASK_NORMAL);
- if (curr->remove)
- list_del_init(&curr->task_list);
+ list_del_init(&curr->task_list);

if (list_empty(&tmp))
break;
diff --git a/localversion-rt b/localversion-rt
index 08b3e75841adc..18777ec0c27d4 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt14
+-rt15
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