[powerpc*] boot: Fix missing crc32poly.h when building with KERNEL_XZ (fixes FTBFS)

debian/changelog

@@ -1,6 +1,8 @@
 linux (4.19~rc2-1~exp2) UNRELEASED; urgency=medium
 
   * [s390x] linux-image: Install compressed kernel image (fixes FTBFS)
+  * [powerpc*] boot: Fix missing crc32poly.h when building with KERNEL_XZ
+    (fixes FTBFS)
 
  -- Ben Hutchings <ben@decadent.org.uk>  Wed, 05 Sep 2018 02:37:19 +0100
 

debian/patches/bugfix/powerpc/powerpc-boot-fix-missing-crc32poly.h-when-building-with-kernel_xz.patch

@@ -0,0 +1,39 @@
+From: Krzysztof Kozlowski <krzk@kernel.org>
+Date: Wed, 29 Aug 2018 09:32:23 +0200
+Subject: powerpc/boot: Fix missing crc32poly.h when building with KERNEL_XZ
+Origin: https://patchwork.ozlabs.org/patch/963258/
+
+After commit faa16bc404d7 ("lib: Use existing define with
+polynomial") the lib/xz/xz_crc32.c includes a header from include/linux
+directory thus any other user of this code should define proper include
+path.
+
+This fixes the build error on powerpc with CONFIG_KERNEL_XZ:
+
+    In file included from ../arch/powerpc/boot/../../../lib/decompress_unxz.c:233:0,
+                     from ../arch/powerpc/boot/decompress.c:42:
+    ../arch/powerpc/boot/../../../lib/xz/xz_crc32.c:18:29: fatal error: linux/crc32poly.h: No such file or directory
+
+Reported-by: Michal Kubecek <mkubecek@suse.cz>
+Fixes: faa16bc404d7 ("lib: Use existing define with polynomial")
+Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
+Reported-by: kbuild test robot <lkp@intel.com>
+Reported-by: Meelis Roos <mroos@linux.ee>
+Tested-by: Michal Kubecek <mkubecek@suse.cz>
+---
+ arch/powerpc/boot/Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
+index 0fb96c26136f..ba4182fb185d 100644
+--- a/arch/powerpc/boot/Makefile
++++ b/arch/powerpc/boot/Makefile
+@@ -63,7 +63,7 @@ ifeq ($(call cc-option-yn, -fstack-protector),y)
+ BOOTCFLAGS	+= -fno-stack-protector
+ endif
+ 
+-BOOTCFLAGS	+= -I$(objtree)/$(obj) -I$(srctree)/$(obj)
++BOOTCFLAGS	+= -I$(objtree)/$(obj) -I$(srctree)/$(obj) -I$(srctree)/include
+ 
+ DTC_FLAGS	?= -p 1024
+ 

debian/patches/series

@@ -75,6 +75,7 @@ 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/arm/arm-mm-export-__sync_icache_dcache-for-xen-privcmd.patch
+bugfix/powerpc/powerpc-boot-fix-missing-crc32poly.h-when-building-with-kernel_xz.patch
 
 # Arch features
 features/mips/MIPS-increase-MAX-PHYSMEM-BITS-on-Loongson-3-only.patch