v4.19.13 snapshot.
diff --git a/scripts/Makefile.asm-generic b/scripts/Makefile.asm-generic
new file mode 100644
index 0000000..32ad8e9
--- /dev/null
+++ b/scripts/Makefile.asm-generic
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: GPL-2.0
+# include/asm-generic contains a lot of files that are used
+# verbatim by several architectures.
+#
+# This Makefile reads the file arch/$(SRCARCH)/include/$(src)/Kbuild
+# and for each file listed in this file with generic-y creates
+# a small wrapper file in $(obj) (arch/$(SRCARCH)/include/generated/$(src))
+
+PHONY := all
+all:
+
+kbuild-file := $(srctree)/arch/$(SRCARCH)/include/$(src)/Kbuild
+-include $(kbuild-file)
+
+include scripts/Kbuild.include
+
+# Create output directory if not already present
+_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
+
+# Stale wrappers when the corresponding files are removed from generic-y
+# need removing.
+generated-y := $(generic-y) $(generated-y)
+all-files := $(patsubst %, $(obj)/%, $(generated-y))
+old-headers := $(wildcard $(obj)/*.h)
+unwanted := $(filter-out $(all-files),$(old-headers))
+
+quiet_cmd_wrap = WRAP $@
+cmd_wrap = echo "\#include <asm-generic/$*.h>" >$@
+
+quiet_cmd_remove = REMOVE $(unwanted)
+cmd_remove = rm -f $(unwanted)
+
+all: $(patsubst %, $(obj)/%, $(generic-y)) FORCE
+ $(if $(unwanted),$(call cmd,remove),)
+ @:
+
+$(obj)/%.h:
+ $(call cmd,wrap)
+
+PHONY += FORCE
+.PHONY: $(PHONY)
+FORCE: ;