From f7fa757621c4489a1ef80de0d9b6b93763f42889 Mon Sep 17 00:00:00 2001
From: Salvatore Bonaccorso <carnil@debian.org>
Date: Thu, 16 Aug 2018 21:17:42 +0200
Subject: [PATCH] [x86] i8259: Add missing include file

---
 debian/changelog                              |  1 +
 .../x86-i8259-add-missing-include-file.patch  | 42 +++++++++++++++++++
 debian/patches/series                         |  1 +
 3 files changed, 44 insertions(+)
 create mode 100644 debian/patches/bugfix/x86/x86-i8259-add-missing-include-file.patch

diff --git a/debian/changelog b/debian/changelog
index 0ed2f6adc..0b45c4302 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -119,6 +119,7 @@ linux (4.17.15-1) UNRELEASED; urgency=medium
 
   [ Salvatore Bonaccorso ]
   * [x86] l1tf: Fix build error seen if CONFIG_KVM_INTEL is disabled
+  * [x86] i8259: Add missing include file
 
  -- Ben Hutchings <ben@decadent.org.uk>  Tue, 14 Aug 2018 00:07:30 +0800
 
diff --git a/debian/patches/bugfix/x86/x86-i8259-add-missing-include-file.patch b/debian/patches/bugfix/x86/x86-i8259-add-missing-include-file.patch
new file mode 100644
index 000000000..e1f15fbd2
--- /dev/null
+++ b/debian/patches/bugfix/x86/x86-i8259-add-missing-include-file.patch
@@ -0,0 +1,42 @@
+From 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 Mon Sep 17 00:00:00 2001
+From: Guenter Roeck <linux@roeck-us.net>
+Date: Wed, 15 Aug 2018 13:22:27 -0700
+Subject: x86: i8259: Add missing include file
+
+From: Guenter Roeck <linux@roeck-us.net>
+
+commit 0a957467c5fd46142bc9c52758ffc552d4c5e2f7 upstream.
+
+i8259.h uses inb/outb and thus needs to include asm/io.h to avoid the
+following build error, as seen with x86_64:defconfig and CONFIG_SMP=n.
+
+  In file included from drivers/rtc/rtc-cmos.c:45:0:
+  arch/x86/include/asm/i8259.h: In function 'inb_pic':
+  arch/x86/include/asm/i8259.h:32:24: error:
+	implicit declaration of function 'inb'
+
+  arch/x86/include/asm/i8259.h: In function 'outb_pic':
+  arch/x86/include/asm/i8259.h:45:2: error:
+	implicit declaration of function 'outb'
+
+Reported-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
+Suggested-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
+Fixes: 447ae3166702 ("x86: Don't include linux/irq.h from asm/hardirq.h")
+Signed-off-by: Guenter Roeck <linux@roeck-us.net>
+Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ arch/x86/include/asm/i8259.h |    1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/x86/include/asm/i8259.h
++++ b/arch/x86/include/asm/i8259.h
+@@ -3,6 +3,7 @@
+ #define _ASM_X86_I8259_H
+ 
+ #include <linux/delay.h>
++#include <asm/io.h>
+ 
+ extern unsigned int cached_irq_mask;
+ 
diff --git a/debian/patches/series b/debian/patches/series
index cf1cc392f..3ab7a61ca 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -70,6 +70,7 @@ bugfix/x86/mmap-add-an-exception-to-the-stack-gap-for-hotspot-jvm.patch
 bugfix/powerpc/powerpc-lib-sstep-fix-building-for-powerpcspe.patch
 bugfix/powerpc/powerpc-lib-makefile-don-t-pull-in-quad.o-for-32-bit.patch
 bugfix/x86/x86-l1tf-fix-build-error-seen-if-config_kvm_intel-is-disabled.patch
+bugfix/x86/x86-i8259-add-missing-include-file.patch
 
 # Arch features
 features/mips/MIPS-increase-MAX-PHYSMEM-BITS-on-Loongson-3-only.patch