linux-kernel - [ANNOUNCE] v5.11.4-rt11

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Date:   Tue, 9 Mar 2021 21:39:56 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: [ANNOUNCE] v5.11.4-rt11

Dear RT folks!

I'm pleased to announce the v5.11.4-rt11 patch set. 

Changes since v5.11.4-rt10:

  - Update the softirq/tasklet patches to the latest version posted to
    the list.

Known issues
     - kdb/kgdb can easily deadlock.
     - netconsole triggers WARN.

The delta patch against v5.11.4-rt10 is appended below and can be found here:
 
     https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.11/incr/patch-5.11.4-rt10-rt11.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 v5.11.4-rt11

The RT patch against v5.11.4 can be found here:

    https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.11/older/patch-5.11.4-rt11.patch.xz

The split quilt queue is available at:

    https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.11/older/patches-5.11.4-rt11.tar.xz

Sebastian

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index ed6e49bceff1a..272ffd12cf756 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -672,6 +672,7 @@ static inline int tasklet_trylock(struct tasklet_struct *t)
 void tasklet_unlock(struct tasklet_struct *t);
 void tasklet_unlock_wait(struct tasklet_struct *t);
 void tasklet_unlock_spin_wait(struct tasklet_struct *t);
+
 #else
 static inline int tasklet_trylock(struct tasklet_struct *t) { return 1; }
 static inline void tasklet_unlock(struct tasklet_struct *t) { }
@@ -702,8 +703,8 @@ static inline void tasklet_disable_nosync(struct tasklet_struct *t)
 }
 
 /*
- * Do not use in new code. There is no real reason to invoke this from
- * atomic contexts.
+ * Do not use in new code. Disabling tasklets from atomic contexts is
+ * error prone and should be avoided.
  */
 static inline void tasklet_disable_in_atomic(struct tasklet_struct *t)
 {
diff --git a/kernel/softirq.c b/kernel/softirq.c
index a9b66aa086366..27551db2b3ccc 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -830,8 +830,8 @@ EXPORT_SYMBOL(tasklet_init);
 
 #if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT)
 /*
- * Do not use in new code. There is no real reason to invoke this from
- * atomic contexts.
+ * Do not use in new code. Waiting for tasklets from atomic contexts is
+ * error prone and should be avoided.
  */
 void tasklet_unlock_spin_wait(struct tasklet_struct *t)
 {
diff --git a/localversion-rt b/localversion-rt
index d79dde624aaac..05c35cb580779 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt10
+-rt11