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| author | Leonard Crestez <leonard.crestez@nxp.com> | 2018-03-13 23:17:23 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-03-23 18:43:19 +0300 |
| commit | 6aaf49b495b446ff6eec0ac983f781ca0dc56a73 (patch) | |
| tree | 6702ab8edb6881406d6fae1cdfb36f88d3e5600a /arch/arm64/crypto/Makefile | |
| parent | eb428ee0e3ca6c8ea6fdfdf24a5918f739933119 (diff) | |
| download | linux-6aaf49b495b446ff6eec0ac983f781ca0dc56a73.tar.xz | |
crypto: arm,arm64 - Fix random regeneration of S_shipped
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>
Diffstat (limited to 'arch/arm64/crypto/Makefile')
| -rw-r--r-- | arch/arm64/crypto/Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/crypto/Makefile b/arch/arm64/crypto/Makefile index 318346a0c1dd..8df9f326f449 100644 --- a/arch/arm64/crypto/Makefile +++ b/arch/arm64/crypto/Makefile @@ -67,6 +67,7 @@ CFLAGS_aes-glue-ce.o := -DUSE_V8_CRYPTO_EXTENSIONS $(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 $(@) @@ -75,5 +76,6 @@ $(src)/sha256-core.S_shipped: $(src)/sha512-armv8.pl $(src)/sha512-core.S_shipped: $(src)/sha512-armv8.pl $(call cmd,perlasm) +endif .PRECIOUS: $(obj)/sha256-core.S $(obj)/sha512-core.S |