Re: [PATCH AUTOSEL 4.14 17/19] selftests: ftrace: Add synthetic event syntax testcase

[Sasha Levin]

On Tue, Oct 30, 2018 at 10:58:15AM -0400, Steven Rostedt wrote:
> On Tue, 30 Oct 2018 09:28:22 -0400
> Sasha Levin <sashal@xxxxxxxxxx> wrote:
>
> > From: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
> >
> > [ Upstream commit ba0e41ca81b935b958006c7120466e2217357827 ]
> >
> > Add a testcase to check the syntax and field types for
> > synthetic_events interface.
> >
> > Link: http://lkml.kernel.org/r/153986838264.18251.16627517536956299922.stgit@devbox
> >
> > Acked-by: Shuah Khan <shuah@xxxxxxxxxx>
> > Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
> > Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
> > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
>
> Why are you adding selftests for old kernels to test a feature that
> wasn't added until 4.17?

We backport all selftest patches to stable to keep selftest on stable
kernels as similar as possible to upstream.

--
Thanks,
Sasha