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Date: Tue, 28 Feb 2017 07:04:53 +1100
From: "Tobin C. Harding" <me@tobin.cc>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org,
 Benjamin Herrenschmidt <benh@kernel.crashing.org>,
 Paul Mackerras <paulus@samba.org>
Subject: Re: PowerPC build fail
Message-ID: <20170227200453.GB3215@eros>
References: <20170222012252.GD6131@eros>
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On Mon, Feb 27, 2017 at 09:38:13PM +1100, Michael Ellerman wrote:
> Hi Tobin,
> 
> "Tobin C. Harding" <me@tobin.cc> writes:
> > The current (2bfe01e) torvalds git tree fails to build on powerpc64. Build machine
> > is virtualized.
> >
> > - Build error
> > arch/powerpc/kernel/time.c: In function ‘running_clock’:
> > arch/powerpc/kernel/time.c:712:25: error: implicit declaration of function ‘cputime_to_nsecs’
> >    return local_clock() - cputime_to_nsecs(kcpustat_this_cpu->cpustat[CPUTIME_STEAL]);
> >                           ^
> ...
> >
> > If you think this can be fixed with the *little* kernel dev knowledge
> > I have please point me at a starting place and I will dig into it.
> 
> Thanks for trying to fix it.
> 
> You got unlucky and pulled Linus' tree just after a cleanup series was
> merged, but before all the bugs had been shaken out.

Au contraire, I felt lucky to have bumped into a bug. I would like to
find more :)

Tobin