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SubjectRe: [PATCH 4/4] crypto: arm64/crc32 - remove PMULL based CRC32 driver
On Mon, Aug 27, 2018 at 01:02:45PM +0200, Ard Biesheuvel wrote:
> Now that the scalar fallbacks have been moved out of this driver into
> the core crc32()/crc32c() routines, we are left with a CRC32 crypto API
> driver for arm64 that is based only on 64x64 polynomial multiplication,
> which is an optional instruction in the ARMv8 architecture, and is less
> and less likely to be available on cores that do not also implement the
> CRC32 instructions, given that those are mandatory in the architecture
> as of ARMv8.1.
> Since the scalar instructions do not require the special handling that
> SIMD instructions do, and since they turn out to be considerably faster
> on some cores (Cortex-A53) as well, there is really no point in keeping
> this code around so let's just remove it.
> Signed-off-by: Ard Biesheuvel <>

Patch applied. Thanks.
Email: Herbert Xu <>
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