Subject: Re: [v5.4 stable] arm: stm32: Regression observed on "no-map" reserved memory region

From: Quentin Perret <[email-masked]>
Date: Thu, 22 Apr 2021 13:03:12 +0000

On Wednesday 21 Apr 2021 at 08:17:28 (-0700), Florian Fainelli wrote:
> 5.10.31 works correctly and shows the following for my platform:
> 
> 40000000-fdffefff : System RAM
>   40200000-40eaffff : Kernel code
>   40eb0000-4237ffff : reserved
>   42380000-425affff : Kernel data
>   45000000-450fffff : reserved
>   47000000-4704ffff : reserved
>   4761e000-47624fff : reserved
>   f8c00000-fdbfffff : reserved
> fdfff000-ffffffff : reserved
> 100000000-13fffffff : System RAM
>   13b000000-13effffff : reserved
>   13f114000-13f173fff : reserved
>   13f174000-13f774fff : reserved
>   13f775000-13f7e8fff : reserved
>   13f7eb000-13f7ecfff : reserved
>   13f7ed000-13f7effff : reserved
>   13f7f0000-13fffffff : reserved

OK, so if we're confident this works from 5.10 onwards, I would suggest
to follow Ard's original suggestion to revert this patch from older
LTSes as we're clearly missing something there.

Thanks,
Quentin

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