v4.19.13 snapshot.
diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile
new file mode 100644
index 0000000..7977764
--- /dev/null
+++ b/lib/raid6/test/Makefile
@@ -0,0 +1,137 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# This is a simple Makefile to test some of the RAID-6 code
+# from userspace.
+#
+
+CC = gcc
+OPTFLAGS = -O2 # Adjust as desired
+CFLAGS = -I.. -I ../../../include -g $(OPTFLAGS)
+LD = ld
+AWK = awk -f
+AR = ar
+RANLIB = ranlib
+OBJS = int1.o int2.o int4.o int8.o int16.o int32.o recov.o algos.o tables.o
+
+ARCH := $(shell uname -m 2>/dev/null | sed -e /s/i.86/i386/)
+ifeq ($(ARCH),i386)
+ CFLAGS += -DCONFIG_X86_32
+ IS_X86 = yes
+endif
+ifeq ($(ARCH),x86_64)
+ CFLAGS += -DCONFIG_X86_64
+ IS_X86 = yes
+endif
+
+ifeq ($(ARCH),arm)
+ CFLAGS += -I../../../arch/arm/include -mfpu=neon
+ HAS_NEON = yes
+endif
+ifeq ($(ARCH),aarch64)
+ CFLAGS += -I../../../arch/arm64/include
+ HAS_NEON = yes
+endif
+
+ifeq ($(IS_X86),yes)
+ OBJS += mmx.o sse1.o sse2.o avx2.o recov_ssse3.o recov_avx2.o avx512.o recov_avx512.o
+ CFLAGS += $(shell echo "vpbroadcastb %xmm0, %ymm1" | \
+ gcc -c -x assembler - >&/dev/null && \
+ rm ./-.o && echo -DCONFIG_AS_AVX2=1)
+ CFLAGS += $(shell echo "vpmovm2b %k1, %zmm5" | \
+ gcc -c -x assembler - >&/dev/null && \
+ rm ./-.o && echo -DCONFIG_AS_AVX512=1)
+else ifeq ($(HAS_NEON),yes)
+ OBJS += neon.o neon1.o neon2.o neon4.o neon8.o recov_neon.o recov_neon_inner.o
+ CFLAGS += -DCONFIG_KERNEL_MODE_NEON=1
+else
+ HAS_ALTIVEC := $(shell printf '\#include <altivec.h>\nvector int a;\n' |\
+ gcc -c -x c - >/dev/null && rm ./-.o && echo yes)
+ ifeq ($(HAS_ALTIVEC),yes)
+ CFLAGS += -I../../../arch/powerpc/include
+ CFLAGS += -DCONFIG_ALTIVEC
+ OBJS += altivec1.o altivec2.o altivec4.o altivec8.o \
+ vpermxor1.o vpermxor2.o vpermxor4.o vpermxor8.o
+ endif
+endif
+
+.c.o:
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+%.c: ../%.c
+ cp -f $< $@
+
+%.uc: ../%.uc
+ cp -f $< $@
+
+all: raid6.a raid6test
+
+raid6.a: $(OBJS)
+ rm -f $@
+ $(AR) cq $@ $^
+ $(RANLIB) $@
+
+raid6test: test.c raid6.a
+ $(CC) $(CFLAGS) -o raid6test $^
+
+neon1.c: neon.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=1 < neon.uc > $@
+
+neon2.c: neon.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=2 < neon.uc > $@
+
+neon4.c: neon.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=4 < neon.uc > $@
+
+neon8.c: neon.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=8 < neon.uc > $@
+
+altivec1.c: altivec.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=1 < altivec.uc > $@
+
+altivec2.c: altivec.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=2 < altivec.uc > $@
+
+altivec4.c: altivec.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=4 < altivec.uc > $@
+
+altivec8.c: altivec.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=8 < altivec.uc > $@
+
+vpermxor1.c: vpermxor.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=1 < vpermxor.uc > $@
+
+vpermxor2.c: vpermxor.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=2 < vpermxor.uc > $@
+
+vpermxor4.c: vpermxor.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=4 < vpermxor.uc > $@
+
+vpermxor8.c: vpermxor.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=8 < vpermxor.uc > $@
+
+int1.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=1 < int.uc > $@
+
+int2.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=2 < int.uc > $@
+
+int4.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=4 < int.uc > $@
+
+int8.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=8 < int.uc > $@
+
+int16.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=16 < int.uc > $@
+
+int32.c: int.uc ../unroll.awk
+ $(AWK) ../unroll.awk -vN=32 < int.uc > $@
+
+tables.c: mktables
+ ./mktables > tables.c
+
+clean:
+ rm -f *.o *.a mktables mktables.c *.uc int*.c altivec*.c vpermxor*.c neon*.c tables.c raid6test
+
+spotless: clean
+ rm -f *~