[rt] Update to 5.4.3-rt1 and re-enable

Adjust for context changes due to backport of
e66b39af00f4 ("workqueue: Fix pwq ref leak in rescuer_thread()") and
def98c84b6cd ("workqueue: Fix spurious sanity check failures in
destroy_workqueue()") in 5.4.4.

1 files changed, 36 insertions, 0 deletions

diff --git a/debian/patches-rt/block-Don-t-disable-interrupts-in-trigger_softirq.patch b/debian/patches-rt/block-Don-t-disable-interrupts-in-trigger_softirq.patch
new file mode 100644
index 000000000..96d516fb1
--- /dev/null
+++ b/debian/patches-rt/block-Don-t-disable-interrupts-in-trigger_softirq.patch
@@ -0,0 +1,36 @@
+From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Date: Fri, 15 Nov 2019 21:37:22 +0100
+Subject: [PATCH] block: Don't disable interrupts in trigger_softirq()
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.4/older/patches-5.4.3-rt1.tar.xz
+
+trigger_softirq() is always invoked as a SMP-function call which is
+always invoked with disables interrupts.
+
+Don't disable interrupt in trigger_softirq() because interrupts are
+already disabled.
+
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ block/blk-softirq.c |    4 ----
+ 1 file changed, 4 deletions(-)
+
+--- a/block/blk-softirq.c
++++ b/block/blk-softirq.c
+@@ -42,17 +42,13 @@ static __latent_entropy void blk_done_so
+ static void trigger_softirq(void *data)
+ {
+ 	struct request *rq = data;
+-	unsigned long flags;
+ 	struct list_head *list;
+ 
+-	local_irq_save(flags);
+ 	list = this_cpu_ptr(&blk_cpu_done);
+ 	list_add_tail(&rq->ipi_list, list);
+ 
+ 	if (list->next == &rq->ipi_list)
+ 		raise_softirq_irqoff(BLOCK_SOFTIRQ);
+-
+-	local_irq_restore(flags);
+ }
+ 
+ /*