v4.19.13 snapshot.
diff --git a/usr/initramfs_data.S b/usr/initramfs_data.S
new file mode 100644
index 0000000..d07648f
--- /dev/null
+++ b/usr/initramfs_data.S
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ initramfs_data includes the compressed binary that is the
+ filesystem used for early user space.
+ Note: Older versions of "as" (prior to binutils 2.11.90.0.23
+ released on 2001-07-14) dit not support .incbin.
+ If you are forced to use older binutils than that then the
+ following trick can be applied to create the resulting binary:
+
+
+ ld -m elf_i386 --format binary --oformat elf32-i386 -r \
+ -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
+ ld -m elf_i386 -r -o built-in.a initramfs_data.o
+
+ For including the .init.ramfs sections, see include/asm-generic/vmlinux.lds.
+
+ The above example is for i386 - the parameters vary from architectures.
+ Eventually look up LDFLAGS_BLOB in an older version of the
+ arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
+
+ Using .incbin has the advantage over ld that the correct flags are set
+ in the ELF header, as required by certain architectures.
+*/
+
+#include <linux/stringify.h>
+#include <asm-generic/vmlinux.lds.h>
+
+.section .init.ramfs,"a"
+__irf_start:
+.incbin __stringify(INITRAMFS_IMAGE)
+__irf_end:
+.section .init.ramfs.info,"a"
+.globl __initramfs_size
+__initramfs_size:
+#ifdef CONFIG_64BIT
+ .quad __irf_end - __irf_start
+#else
+ .long __irf_end - __irf_start
+#endif