Re: LTS perf unwind fix

[gregkh@xxxxxxxxxxxxxxxxxxx]

On Thu, May 27, 2021 at 10:04:51AM +0000, Rantala, Tommi T. (Nokia - FI/Espoo) wrote:
> Hi Greg,
> 
> Please apply these two commits to 5.4.y
> (other LTSes are probably fine too, but I didn't test):
> 
> 
> commit bf53fc6b5f415cddc7118091cb8fd6a211b2320d
> Author: Jan Kratochvil <jan.kratochvil@xxxxxxxxxx>
> Date:   Fri Dec 4 09:17:02 2020 -0300
> 
>     perf unwind: Fix separate debug info files when using elfutils'
> libdw's unwinder
> 
> 
> commit 4e1481445407b86a483616c4542ffdc810efb680
> Author: Dave Rigby <d.rigby@xxxxxx>
> Date:   Thu Feb 18 16:56:54 2021 +0000
> 
>     perf unwind: Set userdata for all __report_module() paths
> 
>     [...]
> 
>     Fixes: bf53fc6b5f41 ("perf unwind: Fix separate debug info files
> when using elfutils' libdw's unwinder")
> 
> 
> These commits fix some broken backtraces when using the perf tool.

Also queued up for the 5.10.y tree as you do not want to move to a newer
kernel and have a regression.

thanks,

greg k-h