Adding debian version 4.19.249-2.debian/4.19.249-2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/debian/patches-rt/0333-mm-memcontrol-Disable-preemption-in-__mod_memcg_lruv.patch b/debian/patches-rt/0333-mm-memcontrol-Disable-preemption-in-__mod_memcg_lruv.patch
new file mode 100644
index 000000000..8c05dc952
--- /dev/null
+++ b/debian/patches-rt/0333-mm-memcontrol-Disable-preemption-in-__mod_memcg_lruv.patch
@@ -0,0 +1,50 @@
+From 5e6613efc5bd79951fdfab9ce61217ba8480a0bc Mon Sep 17 00:00:00 2001
+From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Date: Wed, 28 Oct 2020 18:15:32 +0100
+Subject: [PATCH 333/347] mm/memcontrol: Disable preemption in
+ __mod_memcg_lruvec_state()
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz
+
+[ Upstream commit 74858f0d38a8d3c069a0745ff53ae084c8e7cabb ]
+
+The callers expect disabled preemption/interrupts while invoking
+__mod_memcg_lruvec_state(). This works mainline because a lock of
+somekind is acquired.
+
+Use preempt_disable_rt() where per-CPU variables are accessed and a
+stable pointer is expected. This is also done in __mod_zone_page_state()
+for the same reason.
+
+Cc: stable-rt@vger.kernel.org
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Signed-off-by: Tom Zanussi <zanussi@kernel.org>
+
+ Conflicts:
+	mm/memcontrol.c
+---
+ include/linux/memcontrol.h | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
+index cc6b6532eb56..dbb2c4e27277 100644
+--- a/include/linux/memcontrol.h
++++ b/include/linux/memcontrol.h
+@@ -665,6 +665,7 @@ static inline void __mod_lruvec_state(struct lruvec *lruvec,
+ 
+ 	pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
+ 
++	preempt_disable_rt();
+ 	/* Update memcg */
+ 	__mod_memcg_state(pn->memcg, idx, val);
+ 
+@@ -675,6 +676,7 @@ static inline void __mod_lruvec_state(struct lruvec *lruvec,
+ 		x = 0;
+ 	}
+ 	__this_cpu_write(pn->lruvec_stat_cpu->count[idx], x);
++	preempt_enable_rt();
+ }
+ 
+ static inline void mod_lruvec_state(struct lruvec *lruvec,
+-- 
+2.36.1
+