Re: [PATCH] powerpc: POWER7 optimised copy_to_user/copy_from_user using VMX

On Mon, 2011-12-19 at 14:00 +1100, Benjamin Herrenschmidt wrote:

On Thu, 2011-12-08 at 17:11 +1100, Anton Blanchard wrote:

quoted

Implement a POWER7 optimised copy_to_user/copy_from_user using VMX.
For large aligned copies this new loop is over 10% faster, and for
large unaligned copies it is over 200% faster.

Breaks !CONFIG_ALTIVEC build an pops some WARN's with preempt & lockdep,
this seems to fix them:

And it's missing another ifdef actually for !CONFIG_ALTIVEC, I'll fix it
locally and will put a fixed version in -next.

Cheers,
Ben.