Subject: Re: [PATCH v8 4/8] ppc64 ftrace_with_regs configuration variables

From: Balbir Singh <[email-masked]>
Date: Thu, 11 Feb 2016 20:35:28 +1100

On Thu, 2016-02-11 at 14:09 +0530, Kamalesh Babulal wrote:
> * Balbir Singh <[email-masked]> [2016-02-11 18:48:17]:
> 
> > On Wed, 2016-02-10 at 17:25 +0100, Torsten Duwe wrote:
> > 
> > snip
> > 
> > > diff --git a/arch/powerpc/gcc-mprofile-kernel-notrace.sh
> > > b/arch/powerpc/gcc-mprofile-kernel-notrace.sh
> > > new file mode 100755
> > > index 0000000..68d6482
> > > --- /dev/null
> > > +++ b/arch/powerpc/gcc-mprofile-kernel-notrace.sh
> > > @@ -0,0 +1,33 @@
> > > +#!/bin/sh
> > > +# Test whether the compile option -mprofile-kernel
> > > +# generates profiling code ( = a call to mcount), and
> > > +# whether a function without any global references sets
> > > +# the TOC pointer properly at the beginning, and
> > > +# whether the "notrace" function attribute successfully
> > > +# suppresses the _mcount call.
> > > +
> > > +echo "int func() { return 0; }" | \
> > > +    $* -S -x c -O2 -p -mprofile-kernel - -o - 2> /dev/null | \
> > > +    grep -q "mcount"
> > > +
> > > +trace_result=$?
> > > +
> > > +echo "int func() { return 0; }" | \
> > > +    $* -S -x c -O2 -p -mprofile-kernel - -o - 2> /dev/null | \
> > > +    sed -n -e '/func:/,/bl _mcount/p' | grep -q TOC
> > > +
> > > +leaf_toc_result=$?
> > > +
> > 
> > leaf_toc_result failed for me with gcc 5. I'll try and grab gcc-6
> > and give the patches a spin
> > 
> 
> It fails for me to on ppc64le but pass over ppc64
> 

This series is for ppc64le only, so we can safely ignore ppc64 for now

Regards,
Balbir Singh.