[PATCH] arm64/lib: add optimized implementation of sha_transform

[Marek Vasut]

On Friday, March 14, 2014 at 04:02:33 PM, Ard Biesheuvel wrote:
> This implementation keeps the 64 bytes of workspace in registers rather
> than on the stack, eliminating most of the loads and stores, and reducing
> the instruction count by about 25%.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
> ---
> Hello all,
> 
> No performance numbers I am allowed to share, unfortunately, so if anyone
> else (with access to actual, representative hardware) would care to have a
> go, I would be very grateful.
> 
> This can be done by building the tcrypt.ko module (CONFIG_CRYPTO_TEST=m),
> and inserting the module using 'mode=303' as a parameter (note that the
> insmod always fails, but produces its test output to the kernel log). Also
> note that the sha_transform() function will be part of the kernel proper,
> so just rebuilding the sha1_generic module is not sufficient.
> 
> Cheers,

Won't the function sha_transform() collide with the one in lib/sha1.c ? Or will 
the one in lib/sha1.c be overriden somehow ?

Otherwise:

Reviewed-by: Marek Vasut <marex at denx.de>

Best regards,
Marek Vasut