On 31/03/15 11:56, Michael Ellerman wrote:

On Mon, 2015-23-02 at 18:18:20 UTC, Sudeep Holla wrote:

quoted

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 <redacted>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <redacted>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Anshuman Khandual <redacted>
Cc: linuxppc-dev@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"

Right, sorry for missing this. I just tested corenet32_smp_defconfig.
Also after some digging I found that this patch was written before the
commit 6b36ba8492ab (" powerpc/pseries: Update dynamic cache nodes for
suspend/resume operation"). I had a quick looks at that patch and I am
not sure if we can support that with generic cacheinfo implementation.

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

I think he tried before the above mentioned commit was introduced.

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

I agree, had a quick look at that, and it requires some rework not sure
if that should be in generic code or ppc specific.

Regards,
Sudeep