[RFC/RFT, RESEND] powerpc: move cacheinfo sysfs to generic cacheinfo infrastructure

[Michael Ellerman]

On Mon, 2015-23-02 at 18:18:20 UTC, Sudeep Holla wrote:
> This patch removes the redundant sysfs cacheinfo code by reusing
> the newly introduced generic cacheinfo infrastructure through the
> commit 246246cbde5e ("drivers: base: support cpu cache information
> interface to userspace via sysfs")
> 
> Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>
> Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
> Cc: Paul Mackerras <paulus at samba.org>
> Cc: Michael Ellerman <mpe at ellerman.id.au>
> Cc: Anshuman Khandual <khandual at linux.vnet.ibm.com>
> Cc: linuxppc-dev at lists.ozlabs.org
> ---
>  arch/powerpc/kernel/cacheinfo.c | 811 +++++-----------------------------------
>  arch/powerpc/kernel/cacheinfo.h |   8 -
>  arch/powerpc/kernel/sysfs.c     |  12 +-
>  3 files changed, 91 insertions(+), 740 deletions(-)
>  delete mode 100644 arch/powerpc/kernel/cacheinfo.h
> 
> Hi,
> 
> This patch is not tested. Last time Anshuman tested, he had seen issues.
> The core driver has changed a lot after that. Since PPC depends a lot
> on DT for cache information, there might be issues in the core later
> which I could not identify with ARM/ARM64. It would be much appreciable
> if someone help me in testing and fixing those so that PPC can migrate
> to new/common cacheinfo infrastructure. This resend is rebased on v4.0-rc1

Doesn't build for me.

  arch/powerpc/platforms/pseries/suspend.c:29:36: fatal error: ../../kernel/cacheinfo.h: No such file or directory
  #include "../../kernel/cacheinfo.h"

Anshuman must have worked around that somehow to test it previously?

Removing the include doesn't fix it, it needs cacheinfo_cpu_on/offline().

cheers