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SubjectRe: [PATCH] tracing/function-return-tracer: Add a barrier to ensure return stack index is incremented in memory

* Frederic Weisbecker <> wrote:

> Impact: Fix possible race condition in ftrace function return tracer
> This fixes a possible race condition if index incrementation
> is not immediately flushed in memory.
> Thanks for Andi Kleen and Steven Rostedt for pointing out this issue
> and give me this solution.
> Signed-off-by: Frederic Weisbecker <>
> Cc: Steven Rostedt <>

applied, thanks Frederic!


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