From: Masahiro Yamada <masahiroy@xxxxxxxxxx>
[ Upstream commit 06bd48b6cd97ef3889b68c8e09014d81dbc463f1 ]
You can build a user-space test program for the raid6 library code,
like this:
$ cd lib/raid6/test
$ make
The command in $(shell ...) function is evaluated by /bin/sh by default.
(or, you can specify the shell by passing SHELL=<shell> from command line)
Currently '>&/dev/null' is used to sink both stdout and stderr. Because
this code is bash-ism, it only works when /bin/sh is a symbolic link to
bash (this is the case on RHEL etc.)
This does not work on Ubuntu where /bin/sh is a symbolic link to dash.
I see lots of
/bin/sh: 1: Syntax error: Bad fd number
and
warning "your version of binutils lacks ... support"
Replace it with portable '>/dev/null 2>&1'.
Fixes: 4f8c55c5ad49 ("lib/raid6: build proper files on corresponding arch")
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Acked-by: H. Peter Anvin (Intel) <hpa@xxxxxxxxx>
Reviewed-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>
Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
lib/raid6/test/Makefile | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/raid6/test/Makefile b/lib/raid6/test/Makefile
index 3ab8720aa2f84..b9e6c3648be1a 100644
--- a/lib/raid6/test/Makefile
+++ b/lib/raid6/test/Makefile
@@ -35,13 +35,13 @@ endif
ifeq ($(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 "pshufb %xmm0, %xmm0" | \
- gcc -c -x assembler - >&/dev/null && \
+ gcc -c -x assembler - >/dev/null 2>&1 && \
rm ./-.o && echo -DCONFIG_AS_SSSE3=1)
CFLAGS += $(shell echo "vpbroadcastb %xmm0, %ymm1" | \
- gcc -c -x assembler - >&/dev/null && \
+ gcc -c -x assembler - >/dev/null 2>&1 && \
rm ./-.o && echo -DCONFIG_AS_AVX2=1)
CFLAGS += $(shell echo "vpmovm2b %k1, %zmm5" | \
- gcc -c -x assembler - >&/dev/null && \
+ gcc -c -x assembler - >/dev/null 2>&1 && \
rm ./-.o && echo -DCONFIG_AS_AVX512=1)
else ifeq ($(HAS_NEON),yes)
OBJS += neon.o neon1.o neon2.o neon4.o neon8.o recov_neon.o recov_neon_inner.o
--
2.20.1
