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[35.195.168.105]) by smtp.gmail.com with ESMTPSA id q7sm3518275wrr.62.2021.04.22.05.59.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Apr 2021 05:59:32 -0700 (PDT) Date: Thu, 22 Apr 2021 12:59:30 +0000 From: Quentin Perret To: Florian Fainelli Cc: Ard Biesheuvel , Rob Herring , Alexandre TORGUE , Greg Kroah-Hartman , Sasha Levin , stable , Arnd Bergmann , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "linux-kernel@vger.kernel.org" , Nicolas Boichat , Stephen Boyd , KarimAllah Ahmed , Android Kernel Team , Architecture Mailman List , Frank Rowand , linux-arm-kernel Subject: Re: [v5.4 stable] arm: stm32: Regression observed on "no-map" reserved memory region Message-ID: References: <4a4734d6-49df-677b-71d3-b926c44d89a9@foss.st.com> <001f8550-b625-17d2-85a6-98a483557c70@foss.st.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 21 Apr 2021 at 07:33:52 (-0700), Florian Fainelli wrote: > It is not, otherwise I would have noticed earlier, can you try the same > thing that happens on my platform with a reserved region (without > no-map) adjacent to a reserved region with 'no-map'? I just tried, but still no luck. FTR, I tried to reproduce your setup with the following DT: memory@40000000 { reg = <0x00 0x40000000 0x01 0x00>; device_type = "memory"; }; reserved-memory { #address-cells = <2>; #size-cells = <2>; ranges; foo@fdfff000{ reg = <0x00 0xfdfff000 0x0 0x1000>; }; bar@fe000000{ reg = <0x00 0xfe000000 0x0 0x2000000>; no-map; }; }; And with 5.4.102 and 5.10.31 I get the following in /proc/iomem <...> 40000000-fdffffff : System RAM 40080000-412cffff : Kernel code 412d0000-417affff : reserved 417b0000-419f8fff : Kernel data 48000000-48008fff : reserved f7c00000-fdbfffff : reserved fdfff000-fdffffff : reserved fe000000-ffffffff : reserved 100000000-13fffffff : System RAM <...> which looks about right. I'll keep trying a few other things. Thanks, Quentin