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Date:   Wed, 30 Aug 2017 13:28:28 -0700
From:   Andrew Morton <>
To:     Prakash Gupta <>
Subject: Re: [PATCH 1/2] arm64: stacktrace: avoid listing stacktrace
 functions in stacktrace

On Wed, 30 Aug 2017 13:02:22 +0530 Prakash Gupta <> wrote:

> The stacktraces always begin as follows:
>  [<c00117b4>] save_stack_trace_tsk+0x0/0x98
>  [<c0011870>] save_stack_trace+0x24/0x28
>  ...
> This is because the stack trace code includes the stack frames for itself.
> This is incorrect behaviour, and also leads to "skip" doing the wrong thing
> (which is the number of stack frames to avoid recording.)
> Perversely, it does the right thing when passed a non-current thread.  Fix
> this by ensuring that we have a known constant number of frames above the
> main stack trace function, and always skip these.
> This was fixed for arch arm by Commit 3683f44c42e9 ("ARM: stacktrace: avoid
> listing stacktrace functions in stacktrace")

I can take this (with acks, please?)

3683f44c42e9 has a cc:stable but your patch does not.  Should it?

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