syscall statx not implemented on powerpc

[Chris Packham]

On 15/03/17 00:57, Michael Ellerman wrote:
> Chris Packham <Chris.Packham at alliedtelesis.co.nz> writes:
>
>> On 13/03/17 21:52, Chandan Rajendra wrote:
>>> On Monday, March 13, 2017 03:33:07 AM Chris Packham wrote:
>>>> Hi,
>>>>
>>>> I've just attempted to build a powerpc kernel from 4.11-rc2 using a
>>>> custom defconfig (available on request) and I'm hitting the following
>>>> error in the early stages of compilation.
>>>>
>>>> <stdin>:1325:2: error: #warning syscall statx not implemented [-Werror=cpp]
>>>>
>>>> Same thing seems to happen with mpc85xx_basic_defconfig.
>>>>
>>>> I don't actually need this syscall so I'd be happy to turn something off
>>>> to get things building. I did a quick search and couldn't see anything
>>>> on linuxppc-dev but google keeps correcting "statx" to "stats" so I
>>>> could have missed it.
>>>>
>>>
>>> The upstream commit
>>> (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a528d35e8bfcc521d7cb70aaf03e1bd296c8493f)
>>> that introduces the statx syscall provides a test program. I will wire-up the
>>> syscall on ppc64, run that test program and post the patch if the test program
>>> works well.
>>>
>>
>> Thanks, I'd be happy to test a patch here.
>>
>> In the meantime I worked around the build issue by adding __INGORE_statx
>> to checksyscalls.sh.
>
> Is it actually breaking the build? It's meant to be a warning, and
> that's all I get.
>
> cheers
>

It breaks my builds for ppc and arm. We do have KCFLAGS=-Werror in our 
environment but KCPPFLAGS= is not set so I'm not sure why it's stopping 
compilation.