Makefile patching error in backport from 5.3 to 4.9.214

Hi there,

I am just trying to backport wireless drivers from 5.3 to 4.9.214. I
thought I start with a clean kernel tree to see how all this works.
However when trying to integrate into a kernel-stable tree, I get an
error when the makefile is to be changed:

Modify Kconfig tree ...
Rewrite Makefiles and Kconfig files ...
Applying patches from integration-patches/ to /root/git/linux-stable/
...
Applying patch 001-enable-backports/0001-enable-backports-built-
in.patch
> patching file Makefile
> Hunk #1 succeeded at 571 (offset 29 lines).
> Hunk #2 FAILED at 821.
> Hunk #3 FAILED at 838.
> 2 out of 3 hunks FAILED -- saving rejects to file Makefile.rej

What I did:
cloned linux-stable:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-
stable.git -b v4.9.194

cloned linux-next:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-
next.git

cloned linux-backports:
git clone
git://git.kernel.org/pub/scm/linux/kernel/git/backports/backports.git
-b linux-5.3.y

Then used:
./gentree.py --copy-list ./copy-list --verbose --integrate --clean --
git-revision v5.3 ~/linux-next ~/linux-stable

Apparently the patch created by gentree does not fit to the makefile. I
can amend it by hand, however this seems to be an error in the used
patch?
Anyone know what to do?

Kind Regards
Chris

Makefile.rej content:

--- Makefile
+++ Makefile
@@ -821,13 +822,16 @@ core-y		+= kernel/ mm/ fs/ ipc/
security/ crypto/ block/

 vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
+		     $(backports-y) $(backports-m) \
 		     $(net-y) $(net-m) $(libs-y) $(libs-m)))

 vmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst
%/,%,$(filter %/, \
 		     $(init-n) $(init-) \
 		     $(core-n) $(core-) $(drivers-n) $(drivers-) \
+		     $(backports-n) $(backports-) \
 		     $(net-n)  $(net-)  $(libs-n)    $(libs-))))

+backports-y	:= $(patsubst %/, %/built-in.o, $(backports-y))
 init-y		:= $(patsubst %/, %/built-in.o, $(init-y))
 core-y		:= $(patsubst %/, %/built-in.o, $(core-y))
 drivers-y	:= $(patsubst %/, %/built-in.o, $(drivers-y))
@@ -838,7 +842,7 @@ libs-y		:= $(libs-y1) $(libs-y2)

 # Externally visible symbols (used by link-vmlinux.sh)
 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
-export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-
y)
+export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-
y) $(backports-y)
 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
 export LDFLAGS_vmlinux
 # used by scripts/pacmage/Makefile


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