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SubjectRe: [PATCH] selftests/ftrace: remove _do_fork() leftovers
On Sat, 24 Oct 2020 10:31:12 +0900
Masami Hiramatsu <mhiramat@kernel.org> wrote:

> > Perhaps we should have:
> >
> > # older kernels have do_fork, but newer kernels have kernel_clone
> > echo kernel_clone >> set_ftrace_filter || echo *do_fork >> set_ftrace_filter
>
> Good catch. BTW, can we check the filter-bility by grep the pattern from set_ftrace_filter?

I think we need to use /proc/kallsyms, as the kprobe code should still work
if function tracing is disabled, and the function filter files will not
exist.

-- Steve

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