APPLIED: [bionic] LP#1758856 -- retpoline hinting support

[Seth Forshee]

On Wed, Mar 28, 2018 at 03:57:25PM +0100, Andy Whitcroft wrote:
> On Tue, Mar 27, 2018 at 05:23:52PM -0500, Seth Forshee wrote:
> > On Mon, Mar 26, 2018 at 04:07:45PM +0100, Andy Whitcroft wrote:
> > > We have been having horrible problems with the retpoline information as
> > > recorded in the ABI changing on every update.  The below pull-request
> > > brings in some new support utilising the upstream retpoline annotations.
> > > As well as bringing in some new annotations where needed.
> > > 
> > > This should in time bring us to the situation where the retpoline
> > > information for every branch is empty.  Where unannotated entries remain
> > > they are in review and will be coverered off in later updates.  These
> > > are not regressions.
> > > 
> > > Proposing for bionic.
> > 
> > I tested this with bionic, for non-amd64 arches I'm getting an error
> > packaging the headers:
> > 
> > # We do not need the retpoline information.
> > find /tmp/kernel-sforshee-dc36af1-llEk/build/debian/linux-headers-4.15.0-14-generic/usr/src/linux-headers-4.15.0-14-generic -name \*.o.ur-\* | xargs rm
> > rm: missing operand
> > 
> > Surprisingly I got that for i386 too, which I would have expected to
> > have some of these files.
> 
> You only get it is something 'prepare' creates has .o files, which is
> only objtool which is only amd64.  The error should be benign, but
> changing that to xargs rm -f would be appropriate there.

Thanks, applied to bionic/master-next with this change.