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, 46 insertions, 0 deletions

diff --git a/debian/patches-rt/0056-efi-Disable-runtime-services-on-RT.patch b/debian/patches-rt/0056-efi-Disable-runtime-services-on-RT.patch
new file mode 100644
index 000000000..fe647f6c4
--- /dev/null
+++ b/debian/patches-rt/0056-efi-Disable-runtime-services-on-RT.patch
@@ -0,0 +1,46 @@
+From 6c62319a5f5caaf647997706f6996ce4e8dfc939 Mon Sep 17 00:00:00 2001
+From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+Date: Thu, 26 Jul 2018 15:03:16 +0200
+Subject: [PATCH 056/347] efi: Disable runtime services on RT
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz
+
+Based on meassurements the EFI functions get_variable /
+get_next_variable take up to 2us which looks okay.
+The functions get_time, set_time take around 10ms. Those 10ms are too
+much. Even one ms would be too much.
+Ard mentioned that SetVariable might even trigger larger latencies if
+the firware will erase flash blocks on NOR.
+
+The time-functions are used by efi-rtc and can be triggered during
+runtimed (either via explicit read/write or ntp sync).
+
+The variable write could be used by pstore.
+These functions can be disabled without much of a loss. The poweroff /
+reboot hooks may be provided by PSCI.
+
+Disable EFI's runtime wrappers.
+
+This was observed on "EFI v2.60 by SoftIron Overdrive 1000".
+
+Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ drivers/firmware/efi/efi.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
+index e89932f1ae65..221957ccdb0b 100644
+--- a/drivers/firmware/efi/efi.c
++++ b/drivers/firmware/efi/efi.c
+@@ -87,7 +87,7 @@ struct mm_struct efi_mm = {
+ 
+ struct workqueue_struct *efi_rts_wq;
+ 
+-static bool disable_runtime;
++static bool disable_runtime = IS_ENABLED(CONFIG_PREEMPT_RT_BASE);
+ static int __init setup_noefi(char *arg)
+ {
+ 	disable_runtime = true;
+-- 
+2.36.1
+