4.15-stable review patch. If anyone has any objections, please let me know.
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From: Leonard Crestez leonard.crestez@nxp.com
commit 6aaf49b495b446ff6eec0ac983f781ca0dc56a73 upstream.
The decision to rebuild .S_shipped is made based on the relative timestamps of .S_shipped and .pl files but git makes this essentially random. This means that the perl script might run anyway (usually at most once per checkout), defeating the whole purpose of _shipped.
Fix by skipping the rule unless explicit make variables are provided: REGENERATE_ARM_CRYPTO or REGENERATE_ARM64_CRYPTO.
This can produce nasty occasional build failures downstream, for example for toolchains with broken perl. The solution is minimally intrusive to make it easier to push into stable.
Another report on a similar issue here: https://lkml.org/lkml/2018/3/8/1379
Signed-off-by: Leonard Crestez leonard.crestez@nxp.com Cc: stable@vger.kernel.org Reviewed-by: Masahiro Yamada yamada.masahiro@socionext.com Acked-by: Ard Biesheuvel ard.biesheuvel@linaro.org Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm/crypto/Makefile | 2 ++ arch/arm64/crypto/Makefile | 2 ++ 2 files changed, 4 insertions(+)
--- a/arch/arm/crypto/Makefile +++ b/arch/arm/crypto/Makefile @@ -54,6 +54,7 @@ crct10dif-arm-ce-y := crct10dif-ce-core. crc32-arm-ce-y:= crc32-ce-core.o crc32-ce-glue.o chacha20-neon-y := chacha20-neon-core.o chacha20-neon-glue.o
+ifdef REGENERATE_ARM_CRYPTO quiet_cmd_perl = PERL $@ cmd_perl = $(PERL) $(<) > $(@)
@@ -62,5 +63,6 @@ $(src)/sha256-core.S_shipped: $(src)/sha
$(src)/sha512-core.S_shipped: $(src)/sha512-armv4.pl $(call cmd,perl) +endif
.PRECIOUS: $(obj)/sha256-core.S $(obj)/sha512-core.S --- a/arch/arm64/crypto/Makefile +++ b/arch/arm64/crypto/Makefile @@ -58,6 +58,7 @@ CFLAGS_aes-glue-ce.o := -DUSE_V8_CRYPTO_ $(obj)/aes-glue-%.o: $(src)/aes-glue.c FORCE $(call if_changed_rule,cc_o_c)
+ifdef REGENERATE_ARM64_CRYPTO quiet_cmd_perlasm = PERLASM $@ cmd_perlasm = $(PERL) $(<) void $(@)
@@ -66,5 +67,6 @@ $(src)/sha256-core.S_shipped: $(src)/sha
$(src)/sha512-core.S_shipped: $(src)/sha512-armv8.pl $(call cmd,perlasm) +endif
.PRECIOUS: $(obj)/sha256-core.S $(obj)/sha512-core.S