[rt] Update to 5.9-rt15

[rt] Refresh "stop_machine: Add function and caller debug info"

1 files changed, 0 insertions, 40 deletions

diff --git a/debian/patches-rt/locking-rt-mutex-Flush-block-plug-on-__down_read.patch b/debian/patches-rt/locking-rt-mutex-Flush-block-plug-on-__down_read.patch
deleted file mode 100644
index d81d39003..000000000
--- a/debian/patches-rt/locking-rt-mutex-Flush-block-plug-on-__down_read.patch
+++ /dev/null
@@ -1,40 +0,0 @@
-From: Scott Wood <swood@redhat.com>
-Date: Fri, 4 Jan 2019 15:33:21 -0500
-Subject: [PATCH] locking/rt-mutex: Flush block plug on __down_read()
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.9/older/patches-5.9-rc8-rt12.tar.xz
-
-__down_read() bypasses the rtmutex frontend to call
-rt_mutex_slowlock_locked() directly, and thus it needs to call
-blk_schedule_flush_flug() itself.
-
-Cc: stable-rt@vger.kernel.org
-Signed-off-by: Scott Wood <swood@redhat.com>
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
----
- kernel/locking/rwsem-rt.c |    9 +++++++++
- 1 file changed, 9 insertions(+)
-
---- a/kernel/locking/rwsem-rt.c
-+++ b/kernel/locking/rwsem-rt.c
-@@ -1,5 +1,6 @@
- /*
-  */
-+#include <linux/blkdev.h>
- #include <linux/rwsem.h>
- #include <linux/sched/debug.h>
- #include <linux/sched/signal.h>
-@@ -87,6 +88,14 @@ static int __sched __down_read_common(st
- 
- 	if (__down_read_trylock(sem))
- 		return 0;
-+	/*
-+	 * If rt_mutex blocks, the function sched_submit_work will not call
-+	 * blk_schedule_flush_plug (because tsk_is_pi_blocked would be true).
-+	 * We must call blk_schedule_flush_plug here, if we don't call it,
-+	 * a deadlock in I/O may happen.
-+	 */
-+	if (unlikely(blk_needs_flush_plug(current)))
-+		blk_schedule_flush_plug(current);
- 
- 	might_sleep();
- 	raw_spin_lock_irq(&m->wait_lock);