linux-kernel - Re: [PATCH] crypto: arm64/aes: remove Makefile hack

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Message-ID: <20230804162502.GB30679@willie-the-truck>
Date:   Fri, 4 Aug 2023 17:25:03 +0100
From:   Will Deacon <will@...nel.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ard Biesheuvel <ardb@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] crypto: arm64/aes: remove Makefile hack

On Tue, Aug 01, 2023 at 07:11:46PM +0900, Masahiro Yamada wrote:
> Do it more simiply. This also fixes single target builds.
> 
> [before]
> 
>   $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- arch/arm64/crypto/aes-glue-ce.i
>     [snip]
>   make[4]: *** No rule to make target 'arch/arm64/crypto/aes-glue-ce.i'.  Stop.
> 
> [after]
> 
>   $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- arch/arm64/crypto/aes-glue-ce.i
>     [snip]
>     CPP     arch/arm64/crypto/aes-glue-ce.i
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
> 
>  arch/arm64/crypto/Makefile        | 5 -----
>  arch/arm64/crypto/aes-glue-ce.c   | 2 ++
>  arch/arm64/crypto/aes-glue-neon.c | 1 +
>  3 files changed, 3 insertions(+), 5 deletions(-)
>  create mode 100644 arch/arm64/crypto/aes-glue-ce.c
>  create mode 100644 arch/arm64/crypto/aes-glue-neon.c
> 
> diff --git a/arch/arm64/crypto/Makefile b/arch/arm64/crypto/Makefile
> index 4818e204c2ac..fbe64dce66e0 100644
> --- a/arch/arm64/crypto/Makefile
> +++ b/arch/arm64/crypto/Makefile
> @@ -81,11 +81,6 @@ aes-arm64-y := aes-cipher-core.o aes-cipher-glue.o
>  obj-$(CONFIG_CRYPTO_AES_ARM64_BS) += aes-neon-bs.o
>  aes-neon-bs-y := aes-neonbs-core.o aes-neonbs-glue.o
>  
> -CFLAGS_aes-glue-ce.o	:= -DUSE_V8_CRYPTO_EXTENSIONS
> -
> -$(obj)/aes-glue-%.o: $(src)/aes-glue.c FORCE
> -	$(call if_changed_rule,cc_o_c)
> -
>  quiet_cmd_perlasm = PERLASM $@
>        cmd_perlasm = $(PERL) $(<) void $(@)
>  
> diff --git a/arch/arm64/crypto/aes-glue-ce.c b/arch/arm64/crypto/aes-glue-ce.c
> new file mode 100644
> index 000000000000..7d309ceeddf3
> --- /dev/null
> +++ b/arch/arm64/crypto/aes-glue-ce.c
> @@ -0,0 +1,2 @@
> +#define USE_V8_CRYPTO_EXTENSIONS
> +#include "aes-glue.c"
> diff --git a/arch/arm64/crypto/aes-glue-neon.c b/arch/arm64/crypto/aes-glue-neon.c
> new file mode 100644
> index 000000000000..8ba046321064
> --- /dev/null
> +++ b/arch/arm64/crypto/aes-glue-neon.c
> @@ -0,0 +1 @@
> +#include "aes-glue.c"

Acked-by: Will Deacon <will@...nel.org>

I'm assuming Herbert will pick this up, but please let me know if I
should take it instead.

Will