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

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