On Thu, 2017-06-01 at 10:48:15 UTC, "Naveen N. Rao" wrote:

This fixes a crash when function_graph and jprobes are used together.
This is essentially commit 237d28db036e ("ftrace/jprobes/x86: Fix
conflict between jprobes and function graph tracing"), but for powerpc.

Jprobes breaks function_graph tracing since the jprobe hook needs to use
jprobe_return(), which never returns back to the hook, but instead to
the original jprobe'd function. The solution is to momentarily pause
function_graph tracing before invoking the jprobe hook and re-enable it
when returning back to the original jprobe'd function.

Fixes: 6794c78243bfd ("powerpc64: port of the function graph tracer")
Signed-off-by: Naveen N. Rao <redacted>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/a9f8553e935f26cb5447f67e280946

cheers