Re: [PATCH 1/4] Partially revert "powerpc: Remove duplicate cacheable_memcpy/memzero functions"

[Scott Wood]

On Tue, 2015-05-12 at 15:32 +0200, Christophe Leroy wrote:
> This partially reverts
> commit 'powerpc: Remove duplicate cacheable_memcpy/memzero functions
> ("f909a35bdfb7cb350d078a2cf888162eeb20381c")'

I don't have that SHA.  Do you mean
b05ae4ee602b7dc90771408ccf0972e1b3801a35?

> Functions cacheable_memcpy/memzero are more efficient than
> memcpy/memset as they use the dcbz instruction which avoids refill
> of the cacheline with the data that we will overwrite.

I don't see anything in this patchset that addresses the "NOTE: The old
routines are just flat buggy on kernels that support hardware with
different cacheline sizes" comment.

-Scott


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