This is a note to let you know that I've just added the patch titled
x86: i8259: export legacy_pic symbol
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-i8259-export-legacy_pic-symbol.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Mar 22 14:57:32 CET 2018
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Sat, 8 Apr 2017 19:54:20 +0200
Subject: x86: i8259: export legacy_pic symbol
From: Hans de Goede <hdegoede@xxxxxxxxxx>
[ Upstream commit 7ee06cb2f840a96be46233181ed4557901a74385 ]
The classic PC rtc-coms driver has a workaround for broken ACPI device
nodes for it which lack an irq resource. This workaround used to
unconditionally hardcode the irq to 8 in these cases.
This was causing irq conflict problems on systems without a legacy-pic
so a recent patch added an if (nr_legacy_irqs()) guard to the
workaround to avoid this irq conflict.
nr_legacy_irqs() uses the legacy_pic symbol under the hood causing
an undefined symbol error if the rtc-cmos code is build as a module.
This commit exports the legacy_pic symbol to fix this.
Cc: rtc-linux@xxxxxxxxxxxxxxxx
Cc: alexandre.belloni@xxxxxxxxxxxxxxxxxx
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/i8259.c | 1 +
1 file changed, 1 insertion(+)
--- a/arch/x86/kernel/i8259.c
+++ b/arch/x86/kernel/i8259.c
@@ -418,6 +418,7 @@ struct legacy_pic default_legacy_pic = {
};
struct legacy_pic *legacy_pic = &default_legacy_pic;
+EXPORT_SYMBOL(legacy_pic);
static int __init i8259A_init_ops(void)
{
Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are
queue-4.4/acpi-pmic-xpower-fix-power_table-addresses.patch
queue-4.4/rtc-cmos-do-not-assume-irq-8-for-rtc-when-there-are-no-legacy-irqs.patch
queue-4.4/genirq-use-irqd_get_trigger_type-to-compare-the-trigger-type-for-shared-irqs.patch
queue-4.4/x86-i8259-export-legacy_pic-symbol.patch