Re: [PATCH v2 1/2] lib/crypto: blake2s: include as built-in

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On Thu, Dec 23, 2021 at 03:11:12PM +0100, Jason A. Donenfeld wrote:
> In preparation for using blake2s in the RNG, we change the way that it
> is wired-in to the build system. Instead of kconfig mazes and ifdefs, we
> use weak symbols, so that an arch version can override the generic
> version. Then we include the generic version in lib-y, so that it can be
> removed from the image if the arch version doesn't fallback to it (as is
> the case on arm though not x86). The result should be a bit simpler and
> smaller than the code it replaces.
> 
> Cc: Ard Biesheuvel <ardb@xxxxxxxxxx>
> Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
> Cc: linux-kbuild@xxxxxxxxxxxxxxx
> Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Cc: linux-crypto@xxxxxxxxxxxxxxx
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
> ---
> Herbert - I intend to take this via the crng/random.git tree, since it
> forms a dependency and I'd like to send a pull early in 5.17 cycle.
> 
>  Makefile                          |  2 +-
>  arch/arm/crypto/Kconfig           |  3 +--
>  arch/arm/crypto/blake2s-core.S    |  8 ++++----
>  arch/arm/crypto/blake2s-glue.c    |  6 +++---
>  arch/s390/configs/debug_defconfig |  1 -
>  arch/s390/configs/defconfig       |  1 -
>  arch/x86/crypto/blake2s-glue.c    | 11 +++++------
>  crypto/Kconfig                    |  5 +----
>  drivers/net/Kconfig               |  1 -
>  include/crypto/internal/blake2s.h |  6 +++---
>  lib/Makefile                      |  2 +-
>  lib/crypto/Kconfig                | 25 -------------------------
>  lib/crypto/Makefile               |  7 +++----
>  lib/crypto/blake2s-generic.c      |  6 +++++-
>  lib/crypto/blake2s.c              |  6 ------
>  15 files changed, 27 insertions(+), 63 deletions(-)

Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>



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