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Subject[ANNOUNCE] v4.19.15-rt12
Dear RT folks!

I'm pleased to announce the v4.19.15-rt12 patch set.

Changes since v4.19.15-rt11:

- The read lock of a rwlock did not preserve the task state. This led
to a wrong state while using ptrace. Reported by Joe Korty.

Known issues
- A warning triggered in "rcu_note_context_switch" originated from
SyS_timer_gettime(). The issue was always there, it is now
visible. Reported by Grygorii Strashko and Daniel Wagner.

The delta patch against v4.19.15-rt11 is appended below and can be found here:

You can get this release via the git tree at:

git:// v4.19.15-rt12

The RT patch against v4.19.15 can be found here:

The split quilt queue is available at:


diff --git a/kernel/locking/rwlock-rt.c b/kernel/locking/rwlock-rt.c
index f2e155b2c4a8b..c3b91205161cc 100644
--- a/kernel/locking/rwlock-rt.c
+++ b/kernel/locking/rwlock-rt.c
@@ -128,7 +128,7 @@ void __sched __read_rt_lock(struct rt_rw_lock *lock)
* That would put Reader1 behind the writer waiting on
* Reader2 to call read_unlock() which might be unbound.
- rt_mutex_init_waiter(&waiter, false);
+ rt_mutex_init_waiter(&waiter, true);
rt_spin_lock_slowlock_locked(m, &waiter, flags);
* The slowlock() above is guaranteed to return with the rtmutex is
diff --git a/localversion-rt b/localversion-rt
index 05c35cb580779..6e44e540b927b 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
 \ /
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