Bruce

Can you also backport
https://github.com/torvalds/linux/commit/6bcaf41f9613278cd5897fc80ab93033bda8efaa
to your 5.8 tree please ? this should help fixing selftests.

Thanks
-Khem

On Sun, Aug 23, 2020 at 8:21 PM Mittal, Anuj <[email protected]> wrote:
>
> On Sun, 2020-08-23 at 23:03 -0400, Bruce Ashfield wrote:
> >
> >
> > On Sun, Aug 23, 2020 at 7:59 PM Mittal, Anuj <[email protected]>
> > wrote:
> > > On Sat, 2020-08-22 at 01:20 -0700, Khem Raj wrote:
> > > > Hi Bruce
> > > >
> > > > On rv64 I am seeing an error while building lttng
> > > >
> > > >  #error "LTTng-modules requires CONFIG_KPROBES on kernels >=
> > > 5.7.0"
> > > > >    20 | # error "LTTng-modules requires CONFIG_KPROBES on
> > > kernels
> > > > > >= 5.7.0"
> > > > >       |   ^~~~~
> > > >
> > > > I wonder if we need to update defconfig
> > >
> > > I see the same failure with linux-yocto-rt kernel as well.
> > >
> >
> > -rt doesn't enable kprobes, so yes, with the latest lttng, it would
> > trigger that issue.
> >
> > Traditionally -rt had issues with kprobes, but that is resolved now.
> > Rather than adding the overhead, the enablement is still on demand
> > for -rt.
> >
> > That being said, it looks like lttng has forced my hand, I just
> > enabled the config by default in -rt and don't see any issues.
> >
> > I'll send a patch on Monday to fix it up.
>
>
> Thanks Bruce. Should PREFERRRED_VERSION of linux-yocto-rt should also
> be explicitly set like that of linux-yocto? I was wondering if there is
> a specific reason why we don't set version for that kernel for qemu and
> BSPs?
>
> Thanks,
>
> Anuj
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