Re: [PATCH] lib/sha1: use the git implementation of SHA-1

[Linus Torvalds]

On Sun, Aug 7, 2011 at 12:47 PM, Andreas Schwab <schwab@xxxxxxxxxxxxxx> wrote:
>
> ARM has its own implementation of sha_transform in arch/arm/lib/sha1.S,
> which assumes SHA_WORKSPACE_WORDS is 80.

Well, that certainly explains it.

I wonder if that thing is worth it. It seems to be based on the bad
slow version of sha1, so I suspect that the biggest advantage of it
may the byte-swapping being done more efficiently. The ARM version of
"get_unaligned_be32()" is potentially pretty bad.

Joachim, does it all work for you if you just remove 'sha1.o' from
lib-y in arch/arm/lib/Makefile?

Nico (now with corrected email address): is that ARM-optimized asm
really worth it? Compared to the git C implementation?

                        Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/